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hale gas reservoir modeling and production evaluation considering complex gas transport mechanisms and dispersed distribution of kerogen

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Petroleum Science 2021年第1期18卷 195-218页

作者： Jie Zeng Jishan Liu Wai Li Yee-Kwong Leong Derek Elsworth Jianchun Guo School of Engineering The University of Western Australia35 Stirling HighwayPerthWA 6009Australia Department of Energy and Mineral Engineering G3 Center and Energy InstituteThe Pennsylvania State UniversityUniversity ParkPA 16802USA State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

Stimulated shale reservoirs consist of kerogen,inorganic matter,secondary and hydraulic *** dispersed distribution of kerogen within matrices and complex gas flow mechanisms make production evaluation *** we establish an analytical method that addresses kerogen-inorganic matter gas transfer,dispersed kerogen distribution,and complex gas flow mechanisms to facilitate evaluating gas *** matrix element is defined as a kerogen core with an exterior inorganic *** most previous models,we merely use boundary conditions to describe kerogen-inorganic matter gas transfer without the instantaneous kerogen gas source *** is closer to real inter-porosity flow conditions between kerogen and inorganic *** diffusion,surface diffusion,adsorption/desorption,and slip corrected flow are involved in matrix gas ***-fracture coupling is realized by using a seven-region linear flow *** model is verified against a published model and field *** reveal that inorganic matrices serve as a major gas source especially at early *** provides limited contributions to production even under a pseudo-steady *** properties’influence starts from the late matrix-fracture inter-porosity flow regime,while inorganic matter properties control almost all flow regimes except the early-mid time fracture linear flow *** contribution of different linear flow regions is also documented.

关键词： Analytical solution Shale gas reservoir well performance Kerogen and inorganic matter

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Production data-based facies analysis for well placement in thinlayered reservoir

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Energy Geoscience 2022年第3期3卷 219-234页

作者： Xuequn Tan Shiwang Chen Taiyuan Hong Yuliang Feng Qiang Ding SINOPEC Petroleum Exploration and Production Research Institute Beijing100026China SINOPEC International Petroleum Exploration and Development Corporation Beijing100029China Goldensun Petroleum Technologies Inc Beijing100107China

The exploitation of a thin-layered reservoir with thickness less than 5 m(16 ft)needs to rely upon sedimentary facies analysis,due to the low resolution of seismic data and sparse well ***,the ambiguity of facies interpretation creates uncertainty in facies and reservoir *** study aims to better define facies distribution,predict sand-body architecture,and consequently reduce risks in planning development wells,by integrating production data(dynamic)with conceptual geological models(static).An example is shown from the M1 Member of the Napo Formation in the B and G Oilfields(Block J),Oriente Basin,*** M1 reservoir is a thin-layered sandstone reservoir below seismic *** and well-log facies interpretation indicates depositional facies of a tidedominated *** data during the water injection phase of field development can delineate the detailed geometry of the sand *** injector-producer rate responses can determine the connectivity of sand *** performance during primary recovery can capture the scale of single reservoirs because the initial production rates and the cumulative oil production of individual wells are generally proportional to the size of sand bodies.A facies model was thereby *** step-out wells were planned using this model and drilled *** results demonstrate that the integration of dynamic and static data is critical to understanding reservoir facies distribution.

关键词： Tide-dominated estuary well-log facies Sand-body connectivity well performance Oriente Basin

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Lean HC gas injection pilots analysis and IPR back calculation to examine the impact of asphaltene deposition on flow performance

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Petroleum Research 2019年第1期4卷 84-95页

作者： Fahad I.Syed Mohamed Boukhatem Ahmed A.Al Kiyoumi Abu Dhabi National Oil Company(ADNOC)Offshore Abu DhabiUnited Arab Emirates

Gas injection is one of the most economical and effective approach to improve oil ***,outcome of such approach is contingent to reservoir heterogeneities impacting gas override and ***,injected fluid composition and its compatibility with the reservoir fluid potentially impact flow assurance issues such as asphaltene precipitation into the wellbore and surface *** objective of this paper is to examine the lesson learnt from a couple of field scale 5 spot patterned lean hydrocarbon gas injection pilots which were deployed in a heterogeneous carbonate formation of a giant field located offshore Abu Dhabi under secondary and tertiary drive *** pilots provides a valuable insight on production performance,pressure support,gravity override,fluid composition and evidence of asphaltene deposition that resulted in heavy production loss prior to the solvent *** paper presents the overall pilot performance including pattern recovery,fluid front movement,potential role of heterogeneity in gas breakthrough timings and the operational events to witness asphaltene deposition affecting the flow *** deposited asphaltene cake thickness was measured mechanically during routine tubing clearance check operation that was helpful in estimating production loss due to altered production tubing flow *** an integrated approach is applied to confirm the AOP laboratory measurements with the actual deposits of asphaltene that were found in to the production *** order to confirm the effect of asphaltene deposition on inflow from near wellbore formation to the wellbore,a straightforward yet innovative nodal analysis approach was applied to study well performance using the calibrated and history matched well *** was noticed that not only the outflow was altered because of asphaltene deposition into wellbore but also the inflow(productivity index)was seriously impacted potentially due to asphaltene depos

关键词： Gas injection well performance Asphaltene deposition Formation damage

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