Measurement of Gas-Oil Relative Permeability in Unconventional Rocks

Chhatre, Shreerang S.; Chen, Amy L.; Al-Rukabi, Muhammed; Berry, Daniel W.; Longoria, Robert; Guice, Kyle; Maloney, D.R.

doi:10.15530/urtec-2019-313

Cited by 4 publications

(3 citation statements)

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“…Another complication for relative permeability is matching oil production performance in the early time period, especially for the Upper Wolfcamp A wells. It is imperative to measure relative permeability curves for all three phases (Chhatre et al 2019). We also note that the relative permeability matches for this work were obtained using the commercial software "CMOST".…”

Section: Synthetic Pressure Profilesmentioning

confidence: 99%

Drawdown Management Strategies — Midland Basin Case Studies

Pradhan¹,

Gildin²,

Blasingame³

2021

Proceedings of the 9th Unconventional Resources Technology Conference

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Operators have different production strategies based on maintaining their fracture networks to the reservoir and sand control after flowback. Aggressive production strategies in some liquids-rich producing shale reservoirs could reduce fracture lengths and limit the production life. In addition, operators are constantly trying to achieve a better understanding of the existing fracture network (i.e., to assess if a perceived fracture barrier restricts the potential SRV or if modified drawdown strategies could make up for these "restricted" wells) to determine its impact on different production strategies. This study investigates optimal drawdown strategies through a holistic workflow. The scope of this work will also investigate what are the hydrocarbon recoveries for wells that are landed near a fracture barrier as well as primary-infill well scenarios.The work considers important reservoir and fluid properties to conduct rate-transient analyses, pressure transient analyses, and later to develop the reservoir simulation model to history match and forecast future production rates and pressures. The study considers multiple scenarios of varying properties from fracture and reservoir modeling to obtain a range of recoveries and economics. Case studies will cover the Midland Basin Wolfcamp and Lower Spraberry formations to evaluate how reservoirs of different rock and fluid properties will impact the resulting optimal choke management strategies.Coupled geomechanics and reservoir simulation is a recognized industry practice used to better understand potential fracture network depletion influenced by fracture barriers and primary-infill well scenarios, ultimately providing guidance on optimal drawdown strategies for complex reservoir development scenarios.iii DEDICATION To my family:My parents Amarja and Umesh Pradhanthank you for introducing me to engineering, your unconditional love, and support for everything I do.

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Section: Synthetic Pressure Profilesmentioning

confidence: 99%

Drawdown Management Strategies — Midland Basin Case Studies

Pradhan¹,

Gildin²,

Blasingame³

2021

Proceedings of the 9th Unconventional Resources Technology Conference

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show abstract

“…The extremely low permeability of the rock matrix and the relatively small production history are the main challenges. 21 As a result of extensive difficulties related to direct laboratory measurements, most studies on relative permeability and capillary pressure in unconventional reservoirs are determined from modeling approaches. Ojha et al 22 applied a bimodal fractal model and percolation theory to generate relative permeability and residual water/gas saturations of organic-rich samples from low-pressure nitrogen adsorption/desorption measurements on shale samples.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, understanding of these complicated properties of shale formations is still very limited due to the rarity of appropriate laboratory measurements. The extremely low permeability of the rock matrix and the relatively small production history are the main challenges . As a result of extensive difficulties related to direct laboratory measurements, most studies on relative permeability and capillary pressure in unconventional reservoirs are determined from modeling approaches.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Modeling Study of Water Imbibition and Flowback in Shale: Prediction of Relative Permeability and Capillary Pressure Curves

et al. 2023

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Understanding the invasion and flowback processes of water, as the main source of hydraulic fracking fluid, is crucial for the proper evaluation and development of complex gas shale formations. Direct measurements of full gas−water relative permeability and capillary pressure curves by steady-state or unsteady-state techniques are not feasible in ultralow permeability shales. Therefore, the objective of this study is to investigate the dynamic rock−fluid properties of a Mancos shale sample by mimicking water imbibition and flowback experiments. To do so, a water injection experiment was done and tried to measure the flowback. After that, history matching on the experimental data of the water injection and flowback process was done to predict gas− water relative permeability data and capillary pressure curves. Low water flowback was observed, which insists on water entrapment in shale rocks. The results show a high threshold pressure and meaningful relative permeability of water, which can reduce the gas production rate dramatically. The saturation profiles show a high percentage of water in the invaded zone (>75%); however, the continuous imbibition of water with time (increase in shut-in time) helps the front of the invasion zone to move further deep into the shale, which enhances gas production. The S-shape gas relative permeability curve most likely represents the actual trend of the curve. An optimum shut-in time was predicted, which enables us to avoid delays in starting production operations.

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Application and Practice of Geological Engineering Integrated Tight Oil Fracturing Technology in Jidong Oilfield

Li,

Luo,

et al. 2024

Springer Series in Geomechanics and Geoengineering

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Measurement of Gas-Oil Relative Permeability in Unconventional Rocks

Cited by 4 publications

References 0 publications

Drawdown Management Strategies — Midland Basin Case Studies

Drawdown Management Strategies — Midland Basin Case Studies

Experimental and Modeling Study of Water Imbibition and Flowback in Shale: Prediction of Relative Permeability and Capillary Pressure Curves

Application and Practice of Geological Engineering Integrated Tight Oil Fracturing Technology in Jidong Oilfield

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