多层系致密砂岩气藏水平井开发适应性评价  

Evaluation on Adaptability of Horizontal Well Development to Multi-Layer Tight Sandstone Gas Reservoirs

作　　者：刘姣姣 王德龙[1,2] 刘倩 汤敬[2,3] LIU Jiaojiao;WANG Delong;LIU Qian;TANG Jing(PetroChina Changqing Oilfield Company,Research Institute of Exploration and Development,Xi’an,Shaanxi 710018,China;PetroChina Changqing Oilfield Company,National Engineering Laboratory of Exploration and Development for Low Permeability Oil and Gas Fields,Xi’an,Shaanxi 710018,China;PetroChina Changqing Oilfield Company,Gas Field Development Division,Xi’an,Shaanxi 710018,China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,西安710018 [2]中国石油长庆油田分公司低渗透油气田勘探开发国家工程实验室,西安710018 [3]中国石油长庆油田分公司气田开发事业部,西安710018

出　　处：《新疆石油地质》2022年第3期354-359,共6页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2016ZX05015-001)。

摘　　要：对于神木气田多层系气藏,若水平井开发地质目标选择不当,会降低储量动用程度和经济效益。研究神木气田储集层砂体发育规模及叠置模式,采用剖面储量集中度概念,建立单层式、双层式和多层式气藏模型。以水平井增产倍比作为经济效益评价依据,评价多层系气藏水平井开发储集层界限。研究表明:神木气田下二叠统太原组及山西组二段局部发育较大规模复合有效储集层,有效厚度为6.0~9.0 m,长度为1600~3200 m,储量集中度大于75%,主产层与次产层渗透率比值为0.8~3.9,具备水平井开发的最佳储集层条件。For multilayer gas reservoirs in the Shenmu gas field,improper selection of geological targets for horizontal well development may lead to the problems such as poor economic benefits and unrecovered reserves.The development scale and stacking patterns of sand bodies in these multilayer gas reservoirs were investigated,and the singlelayer,doublelayer and multilayer gas reservoir models were established by adopting the concept of reserves concentration.Taking the horizontal well stimulation ratio as the basis for economic benefit evaluation,the reservoir limit of horizontal well development in multilayer reservoirs was evaluated.The research shows that largescale composite effective reservoirs are locally developed in the Lower Permian Taiyuan formation and the second member of the Lower Permian Shanxi formation in the Shenmu gas field,with an effective thickness of 6.0-9.0 m and a length of 1600-3200 m.These intervals satisfy the optimal reservoir conditions for horizontal well development,namely the reserves concentration greater than 75%and the permeability ratio of the dominant layer to the secondary producing layer ranging from 0.8 to 3.9.

关 键 词：神木气田 多层系致密气藏 储量集中度 砂体叠置模式 水平井开发 物性界限 增产倍比 经济效益 

分 类 号：TE375[石油与天然气工程—油气田开发工程]