Improving Stimulation Effectiveness – Field Results in the Haynesville Shale

Pope, Charles David; Palisch, Terrence T.; Lolon, Elyezer; Dzubin, Brian Alan; Chapman, Mark

doi:10.2118/134165-ms

Cited by 22 publications

(4 citation statements)

References 19 publications

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“…Haynesville Shale Pope et al (2010) give a porosity range of 0.06 to 0.12 for the Haynesville Shale, which is consistent with the correlation value of 0.084. The permeability computed from the correlation is 1.2 x 10 -21 m 2 normal to bedding and 3.6 x 10 -21 m 2 parallel to bedding.…”

Section: 34supporting

confidence: 86%

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

Dobson¹

2013

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SUMMARY Inventory of Shale Formations in the USThis section provides a summary of the distribution, thickness, and depth of selected shale formations found within many of the sedimentary basins in the contiguous US. Clay-rich shale formations have a number of properties, such as low permeability, high cation exchange potential, and the ability to self seal, which make them candidates for a geologic repository for high-level radioactive waste. The United States has an abundance of thick shale deposits that span a wide range of geologic ages, mineralogic compositions, and geologic environments, some of which might be suitable for hosting repositories to safeguard radioactive waste. The objective of this report is to build upon previous compilations of shale formations within many of the major sedimentary basins in the US by developing GIS data delineating isopach and structural depth maps for many of these units. These data are being incorporated into the LANL digital GIS database being developed for determining host rock distribution and depth/thickness parameters consistent with repository design. Rock Properties and In-Situ Conditions for Shale Estimated from Sonic Velocity MeasurementsThis section presents the development of methods to assess hydrological and geomechanical properties and conditions for shale formations based on sonic velocity measurements. Publically available data sets have been identified for shales under investigation for nuclear waste disposal in Europe and from shales of interest for oil exploration and production in the North Sea. These data have been used in the development of several correlations which link properties to sonic compressional velocity. The advantage of using correlations based on sonic velocity is that properties can be estimated from geophysical logs. This information is often more readily available than direct property measurements on core that would otherwise be required. Furthermore, geophysical logs typically provide a continuous readout along wells that can be more readily used to characterize spatial variability in properties. The correlations developed are then used to assess properties and conditions in several shale formations of interest within the United States which have publically available data on sonic velocity. Some of the proposed correlations have been previously investigated by others and comparisons between correlations are reasonably consistent. The approach has been extended here to other properties as well as insitu conditions, in particular, a method to estimate pore-fluid pressure. A method is also developed and used to account for anisotropy for properties where sufficient information is available to assess directional dependence. Some of the correlations, in particular estimation of sonic velocity parallel to bedding from normal to bedding sonic velocity measurements, and estimation of clay content from sonic velocity were found to be weak, indicating that additional independent measurements are desirable to supplement such estimates. Several ...

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Section: 34supporting

confidence: 86%

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

Dobson¹

2013

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“…Hence, if the goal of the study is capturing the mean, then select the GAM model, otherwise, the FRK model is better suited for the analysis. The importance of drilling and completion technology, and geological consideration to the successful development of unconventional resources is well documented (Chong et al 2010;Kolawole et al 2019 Pope, et al 2010;Sharma et al 2014;Soliman, et al 2014). For this reason, completion and geologic parameters were included in the Bakken models because these variables were available.…”

Section: Model Summarymentioning

confidence: 99%

Comparative evaluation of multi-basin production performance and application of spatio-temporal models for unconventional oil and gas production prediction

Wigwe

Bougre

Watson

et al. 2020

J Petrol Explor Prod Technol

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Modern data analytic techniques, statistical and machine-learning algorithms have received widespread applications for solving oil and gas problems. As we face problems of parent–child well interactions, well spacing, and depletion concerns, it becomes necessary to model the effect of geology, completion design, and well parameters on production using models that can capture both spatial and temporal variability of the covariates on the response variable. We accomplish this using a well-formulated spatio-temporal (ST) model. In this paper, we present a multi-basin study of production performance evaluation and applications of ST models for oil and gas data. We analyzed dataset from 10,077 horizontal wells from 2008 to 2019 in five unconventional formations in the USA: Bakken, Marcellus, Eagleford, Wolfcamp, and Bone Spring formations. We evaluated well production performance and performance of new completions over time. Results show increased productivity of oil and gas since 2008. Also, the Bakken wells performed better for the counties evaluated. We present two methods for fitting spatio-temporal models: fixed rank kriging and ST generalized additive models using thin plate and cubic regression splines as basis functions in the spline-based smooths. Results show a significant effect on production by the smooth term, accounting for between 60 and 95% of the variability in the six-month production. Overall, we saw a better production response to completions for the gas formations compared to oil-rich plays. The results highlight the benefits of spatio-temporal models in production prediction as it implicitly accounts for geology and technological changes with time.

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“…Hydraulic fracturing has proven to be an effective method for enhancing the production of both conventional and unconventional oil and gas reservoirs through the expansion of drainage zones. Currently, multi-fracturing techniques for horizontal wells are becoming increasingly popular in the fracturing community (Pope et al 2010;Chaudhri 2012;Yu et al 2014). In order to improve the efficiency of transformation and reduce operation costs, the "well factory" model is often used to develop shale oil and gas (Ladlee and Jacquet 2011).…”

Section: Introductionmentioning

confidence: 99%

An XFEM-based CZM Numerical Strategy for Modeling Hydraulic Fracture Propagation under Different Fracturing Schemes

Zhang,

Chen,

Wang

2023

J. Phys.: Conf. Ser.

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Segmented and cluster fracturing can improve the efficiency of volume stimulation in shale reservoirs and reduce construction costs. It is important to clarify the propagation characteristics of hydraulic fractures and stress interference under different fracturing techniques to optimize the process of clustered and staged fracturing. For this purpose, we have developed a 2D XFEM-based CZM hydraulic fracturing model. The capability of this model was validated by analytical solutions and then used to study the propagation paths of hydraulic fractures and the characteristics of stress interference under simultaneous fracturing, sequential fracturing, zipper fracturing and multi-cluster fracturing. The results show that in simultaneous fracturing, the middle cluster is compressed by the external position clusters, and the opening width of hydraulic fractures is reduced. In sequential fracturing, the fracture that first initiates create an additional stress field that inhibits the propagation distance of subsequent fractures and the propagation path of hydraulic fractures is also affected in the stress shadow region. Zipper fracturing can effectively alleviate stress interference between multiple fractures, and internal fractures can also propagate a certain distance. In multi-cluster fracturing, the fluid rate into the internal fractures may be limited, and fracture propagation is also limited by stress interference. Therefore, it is necessary to optimize the parameters of clusters to ensure that all clusters can initiate fractures normally. The research results are important for the parameter optimization of clustered and staged fracturing, especially for well factory fracturing mode.

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Improving Stimulation Effectiveness – Field Results in the Haynesville Shale

Cited by 22 publications

References 19 publications

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

Comparative evaluation of multi-basin production performance and application of spatio-temporal models for unconventional oil and gas production prediction

An XFEM-based CZM Numerical Strategy for Modeling Hydraulic Fracture Propagation under Different Fracturing Schemes

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