Well Logging and Formation Evaluation (Gulf Drilling Guides)

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Erberli Doodlebugging: Tr by Elaine Scott. Johnson How to try to find an oil field by Doris M. Anstey Seismic coal exploration : in-seam seismics by L. Lovejoy Basin analysis quantitative methods. Kupecz next. Wording Edition. What is MDS? This paper provides a robust methodology for miscible CO2 WAG experimental-data acquisition and history matching. This paper describes a case study of the Chonskaya group of fields to demonstrate an approach to the integration of time-domain-electromagnetic TDEM electrical and seismic data when building a geological model for improving reservoir-property and -saturation prediction.

One goal for the field was significant crude production by means of a secondary reservoir section. Nonaqueous drilling fluids, such as synthetic-based and oil-based mud SBM and OBM, respectively , are used frequently to drill one or more sections of a well to reduce drilling problems such as shale sloughing, wellbore stability, and stuck pipe. Three onshore fields in the Emirate of Sharjah, United Arab Emirates, have more than 30 years of production history from more than 50 gas-condensate wells. This paper presents technologies and best practices to improve oil recovery in mature fields through waterflooding optimization.

These technologies have proved practical and cost-effective. This paper presents an interdisciplinary approach to the description of tectonic dislocations made on the basis of interpretation of seismic data, petrophysical analysis of well-logging data in horizontal wells, and inversion of a multifrequency propagation tool.

Well Logging and Formation Evaluation

This paper describes how a technique known as applied-surface-backpressure managed-pressure drilling ASBP-MPD can alleviate the limitations of conventional deepwater well control. Since the s, many technical works have focused on improving the ability to detect hydrocarbons inside the riser and safely remove them from the system. This trend gained extra momentum with the advent of systems such as riser-gas handlers and managed-pressure drilling. In the clustered-development approach, the geologic dependence between prospects is combined with the aggregation of prospects to determine the economic viability of a grassroots development offshore.

Creativity and innovation have long characterized production and facilities, and this year is no exception. The economic challenges of the oil industry clearly have provided a strong stimulus for even more creativity and innovation.

This new conceptual framework for capital-allocation management, known as advanced risk and capital-allocation management ARCAM , aims to synchronize risk, strategy, and capital decision modeling to provide better visibility of future performance of capital-investment opportunities. Any entity assessing project viability at any stage of the exploration-to-production life cycle must ensure an evergreen examination of the commercial likelihood on the basis of an ongoing data analysis, refining development synergies coupled with strategic reframing as required. Recent research shows that, in addition to hardness, other rock properties, such as lithology types, heterogeneity, and abrasiveness, have equal importance in bit evaluations.

Consequently, the discussion must move from rock-strength analysis to rock-drillability analysis. Produced water has been an albatross around the neck of operators for a long time. Efforts to solve its challenges have been extensive and continue to evolve. These efforts can have a strong effect on the profitability of an operation. This paper focuses on compressor systems associated with major production deferments. An advanced machine-learning approach is presented for determining anomalous behavior to predict a potential trip and probable root cause with sufficient warning to allow for intervention.

The objective of this case study is to describe a specific approach to establishing an exploration strategy at the initial stage on the basis of not only uncertainty reduction, but also early business-case development and maximization of future economic value.


This paper presents the implementation of an approach for improving oil recovery by water-injection optimization using injection-control devices ICDs in unconventional reservoirs. This paper presents an unbiased stochastic data-driven work flow in which surface and subsurface uncertainties are accounted for and their effects on facilities design and operational decisions are quantified. Using log data from offset wells, a bit-selection software based on unconfined compressive strength UCMPS calculations has been used to optimize the bit selection for Well X.

Severe bit damage is an issue in West Texas land drilling because of abrasive sand formation and interbedded hard stringers. This paper aims to provide an introduction to the early management of downhole produced water in strong waterdrive reservoirs using inverted electrical-submersible-pump ESP technology. This paper presents pilot-testing results and economics from a novel electrochemical desalination technology for enhanced oil recovery EOR produced water.

Operators face a dilemma in balancing the need for mud weight MW to remain below the fracture gradient to avoid losses, while also providing sufficient density to block influxes into the well. If you could only choose one of these technologies with which to optimize your next offshore compression, which would it be?

The reservoir section of a gas field offshore Sarawak, Malaysia, consists of two massive pinnacle carbonate structures with heterogeneous porosity and permeability and many vugs and faults. It is no secret that drilling fluid is crucial in drilling operations. The main function of drilling fluids is to transport drill cuttings from the bottom of the hole up to the surface. Drill cuttings then will be separated on the surface before being recycled back for further drilling.

With the arrival and development of rotary steerable systems in the late s, the industry thought that drilling a perfectly smooth and controlled trajectory would not be an issue. This paper describes a new approach to evaluating the effectiveness of the rotary-steerable-system RSS steering mechanism on wellbore tortuosity in horizontal wells. Comprehension of the mechanisms that influence wax deposition in oil-production systems has not yet been achieved fully. This paper investigates the influence of the Reynolds number on wax deposition.

Does better data lead to better outcomes for one or even for all? High-quality data have become a resource in themselves, to be traded and leveraged for personal gain. Erosion caused by fine solid particles presents one of the greatest threats to oil and gas flow assurance, consequently affecting material selection and wall-thickness design.

Offshore production assurance continues to drive new production technology applications and approaches. The three papers highlighted here focus on developing analytical tools and performing root-cause analyses while providing safe, cost-effective, and reliable operations. Organophilic clays mixed in oil-based drilling fluids OBDFs do not exhibit the same viscosity or suspension characteristics as they do in water-based drilling fluids.

A new mineral-oil-based drilling fluid MOBDF was created by replacing the conventional organophilic clay with a novel polymer. The use of organophilic clays as additives to provide proper rheological and filtration properties in nonaqueous drilling fluids NADFs has long been a topic of study. This paper introduced a modified rectorite designed for biodiesel-based drilling fluid BBDF. This paper presents an approach to modeling the cuttings-lag-depth distribution caused by the dispersion of cuttings-transport velocity in directional drilling.

This paper demonstrates a work flow to determine optimal lateral lengths and trajectories in the Midland Basin by studying the effect of the lateral length and trajectory on well production. This paper evaluates the incremental benefit of water injection in a conventional gas reservoir when compared with gas compression.

In this paper, past gas-cycling operations were examined to identify subsurface implications and effects on operability aspects for the Arun giant gas field offshore Indonesia in the North Sumatra Basin. The Eagle Ford formation has produced approximately 2 billion bbl of oil during the last 7 years, yet its potential may be even greater. Using improved oil-recovery IOR methods could result in billions of additional barrels of production. This paper evaluates potential causes of failure for nine pipelines operating in shallow waters 8 to 14 m in the Gulf of Guinea.

The authors develop an analytical method to identify root causes and provide recommendations for pipeline design and placement. With drilling on the rise, US oil production is expected to continue to increase. With low primary-recovery rates in unconventional reservoirs and the longer-term development prospects for EOR applications on a fieldwide scale, the potential for accelerated completion optimization in new wells and production-enhancement treatments in existing wells is substantial.

Expectations from data analytics in the upstream sector continue to evolve. Although the number and diversity of applications continue to increase, the adoption at the assetwide level faces well-known barriers and challenges. Recent advances in field development are not based on specific technical breakthroughs although shale oil and gas and deep oil owe a lot to those but on economic models and scenarios run at the very beginning, before any dollar is invested.

On the technology side, regardless of the oil price, demand persists for cost-saving and value-adding innovations and emerging technologies to bridge gaps in the existing technology portfolio for sand management and control. In this paper, a new type of sand-consolidation low-viscous binding material, based on a combination of inorganic and organic components, is presented. This paper presents the first successful application of ceramic sand screens offshore Malaysia.

Ceramic sand screens were considered as a remedial sand-control method because of their superior durability and resistance compared with metallic sand screens. This paper proposes a new work flow to simulate water-hammer events, the resulting wellbore failure, and sand production in water injectors.

Well Logging and Formation Evaluation - Toby Darling - Google книги

This paper shows how a new approach to small fields could unlock more than twice the net present value NPV of larger conventional fields in Southeast Asia at a similar level of capital expenditure CAPEX. The results of numerical simulations for the Lost Hills field were not successful because of the special characteristics of its diatomite reservoirs—low permeability but high porosity, weak rock strength, and strong imbibition.

Well-placement optimization is one of the more challenging problems in the oil and gas industry. Although several optimization methods have been proposed, the most-used approach remains that of manual optimization by reservoir engineers. This paper evaluates the ability of different groups of surfactants to improve oil recovery in unconventional liquid reservoirs ULRs by experimentally simulating the fracture treatment to represent surfactant imbibition in a ULR core fracture during a soaking flowback.

This paper presents a new approach for more-accurate modeling of liquid blockage in tight oil and gas reservoirs and investigates the use of solvents for blockage removal. This paper demonstrates the viability of a production-data-classification approach adapted from real-time face detection for identifying restimulation candidates.

A new geostatistics modeling methodology that connects geostatistics and machine-learning methodologies, uses nonlinear topological mapping to reduce the original high-dimensional data space, and uses unsupervised-learning algorithms to bypass problems with supervised-learning algorithms. This paper proposes a new method of economic prediction on the basis of expert library and oilfield databases.

Lesson 4 - Introduction to Well Logs

The method takes into account geological factors and the effect of production factors on the economic prediction. A new detection and alerting methodology, validated on more than North America onshore wells, blends well information and real-time data to determine a probabilistic belief system.

An operator used the system to detect, predict, and alert rig crews to washouts and pump failures. The data collected via monitoring and metering applications are increasingly viewed as central to assessing production performance and in decision making to optimize field development and operations. A company is selling a new well testing tool designed to be a cheaper, simpler way to do fiber optic sensing, and then it fades away.

If the industry until recently was lamenting that a global upstream investment slump caused a focus on incremental technology improvements, now a looming oil-supply shortage has reignited discussions about how innovation, digital technologies, and collaborations can accelerate future major projects.

The last 3 years have seen an unprecedented increase in paraffin-related challenges. The featured papers give some insights into the work under way at some companies to elucidate the structure performance relationships between inhibitors and crude oils containing these higher paraffinic species.

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Signs of maturity in drilling systems automation are evident in the success stories filtering out of technical conferences and in the attraction of top university talent to an annual, international, drilling-systems-automation contest. This paper presents a case study that is an example of how reassessing a flow-assurance risk-management strategy for operating assets can identify opportunities for optimization. Hardware innovation will continue to occur, but data analytics, multivariate modeling, and process optimization are emerging as new contributors to completion success.

This paper presents the evolution of a Bakken advanced completion design with the added enhancement of extreme limited entry XLE perforating. With this strategy, an operator has consistently stimulated more than 11 perforation clusters per stage.

This paper proposes a metric for quantifying drilling efficiency and drilling optimization that is computed by use of a Bayesian network. This work presents a systematic geosteering work flow that automatically integrates a priori information and real-time measurements to update geomodels with uncertainties and uses the latest model predictions in a decision-support system DSS.