Estimation and Interpretation of Hydraulic Fracture Parameters from Microseismic Data in Shale Plays or Are Pairs of Horizontal Stimulated Wells Generating a More Complex Stimulation?

Hull, Robert; Meek, Robert; Milliken, Mike; Ndungu, John; Thomas, Michael B.

doi:10.1190/urtec2013-075

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…One is to obtain fracture parameters through field monitoring technology, some of the most usual ones being microseismic monitoring technology. It can directly and quantitatively characterize the orientation, height, length and width of the fracture [3][4], but these parameters obtained by this method are the propagation range of the fracture, without considering whether the fracture has seepage capacity, and the actual effective fracture length is less than half of the microseismic interpretation. And the other is to establish seepage model in different stages to invert fracture parameters.…”

Section: Introductionmentioning

confidence: 99%

Fracture parameter inversion method of deep coalbed methane wells after hydraulic fracturing based on production dynamic analysis

Zhang,

Huang,

Zhao

et al. 2024

Preprint

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Parametric inversion is recognized to be an effective method for evaluation of hydraulic fracturing performance. Based on the unsteady seepage theory, the fracture parameters inversion method of deep coalbed methane (CBM) reservoir is established and solved semi-analytically considering the gas-water twophase flow and the multiple nonlinear seepage mechanism of gas and water in the matrix and fractures. The numerical results from the proposed method are consistent with that from the existing numerical method and the computational speed is heightened greatly. The results show that the proposed method can accurately obtain half-length of fracture, permeability of fracture and stimulated reservoir volume (SRV) using the production data entering the boundary control flow stage.

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Section: Introductionmentioning

confidence: 99%

Fracture parameter inversion method of deep coalbed methane wells after hydraulic fracturing based on production dynamic analysis

Zhang,

Huang,

Zhao

et al. 2024

Preprint

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A Closer Look at Hydraulic Fractures: Case Studies of Microseismic Results from Horizontal Monitoring Wells

Gao

et al. 2021

Day 2 Wed, October 13, 2021

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Amongst different options of hydraulic fracture geometry detection or measurement, microseismic monitoring is a commonly used method to reveal the hydraulic fracture geometry in three-dimensional space. Microseismic monitoring typically requires one or several monitoring wells within an effective range from the treatment well, in which the geophones are set to detect the microseismic events occurring during or after the treatment. In the past, most of the monitoring wells have been vertical wells. We present several recent case studies in which both the treatment and monitoring wells were horizontal wells, which produced some unique and interesting observations beyond the initial expectations. One of the prerequisites of a proper microseismic monitoring of hydraulic fracturing treatment is to place the geophone in the proper position because a long distance between the actual fracturing events and the geophone may result in signal deterioration, which influences the processing and increases the uncertainty. This problem is more severe if the treatment well is a horizontal well because the distance from the geophone to the microseismic events varies between stages. One of the methods to solve this issue is to monitor the microseismic events in a horizontal offset well. As horizontal wells are often batched drilled in clusters for tight or unconventional resource nowadays, the availability of the monitoring well is less of a problem, and the constant distance from the monitoring well to the treatment well may help to generate better data quality and more accurate interpretation result. We implemented horizontal well monitoring in two difference cases between 2018 and 2019. For case A, one horizontal monitoring well was used to monitor 54 fracturing stages in three offset wells, and for case B, we monitored 24 fracturing stages in one offset well. In both cases, the geophone arrays were shifted in multiple positions to fit the distance requirements, and both cases generate satisfying interpretation results. The microseismic results from the two cases showed less uncertainty and better precision of microseismic events after processing, as we expected. What is surprising is this type of monitoring showed a unique physical phenomenon a couple of times, which is a casing background noise indicating excessive fracturing extension over a long distance. This phenomenon was captured in both cases, even with small injection rate and fluid volumes, which can be important information for us to better understand the dynamics of fracture propagation in such geomechanical environment and help to set a new guideline and design reference in the same region.

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Adding Extra Dimensions for Completion Consideration: Case Studies with Geoengineering, Measurement While Pumping, and Data Mining

Liu

Zhao

et al. 2021

Day 4 Thu, November 18, 2021

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Well completion has evolved rapidly in the past two decades, as multistage completion has become the predominant practice to complete a well in many places. Although innovation in completion tool technology has been continuous in recent years, there are still gaps in the well completion optimization practice. In this paper, we add additional dimensions to well completion technology by incorporating geoengineering, measurement while pumping, and data mining, and we have evidence to show that those additional elements help to improve our understanding, on-site efficiency, and overall performance. Multistage completion optimization is about where and how to complete a well. Different methods were employed in the past, and even with a better-engineered completion design where both reservoir and completion quality are honored, there are still area for improvement. For example, 1) geological properties are not qualitatively utilized in the completion design; 2) real-time operational feedback during the execution phase is inadequate for in-time decisions for completion and fracturing adjustment; 3) the completion-to-well-performance cycle is so long that the learning curve is not fast enough, and too many influential factors are hidden in the details. Three extra dimensions were added to address the improvement areas. Geoengineering adds "space information" in enabling geological properties from a 3D space grid to be projected onto the wellbore as geology quality (GQ) so that the information can be used together with reservoir and completion quality (RQ and CQ) quantitatively to improve the fracturing treatment design. Measurement while pumping (MWP) adds "timely feedback" in that real-time operational feedback—either from the wellbore via high-frequency pressure monitoring or from the target zones via microseismic data in offset horizontal monitoring wells—can help with the completion and fracture diagnosis and decision making on-site. Data mining adds "pattern recognition" in that reservoir and operation data are collected and analyzed to generate a systematic understanding of the reservoir complexity, paving the way for the improved planning of future well completions in the same region. Each of the solutions comes with specific case studies in our work. Geoengineering, MWP, and data mining add three dimensions to the current well completion practice. In our case studies, these approaches have demonstrated the capability to improve the accuracy of the design, increase confidence in the execution, and accelerate the learning curve from evaluation. The extra dimensions added to the current completion practice are essentially space, time, and pattern, and together, they help to define the direction of future innovations for completion optimization.

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Estimation and Interpretation of Hydraulic Fracture Parameters from Microseismic Data in Shale Plays or Are Pairs of Horizontal Stimulated Wells Generating a More Complex Stimulation?

Cited by 3 publications

References 5 publications

Fracture parameter inversion method of deep coalbed methane wells after hydraulic fracturing based on production dynamic analysis

Fracture parameter inversion method of deep coalbed methane wells after hydraulic fracturing based on production dynamic analysis

A Closer Look at Hydraulic Fractures: Case Studies of Microseismic Results from Horizontal Monitoring Wells

Adding Extra Dimensions for Completion Consideration: Case Studies with Geoengineering, Measurement While Pumping, and Data Mining

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