天然气工业2017，Vol.37Issue(7)：1-12,12.DOI:10.3787/j.issn.1000-0976.2017.07.001
四川盆地页岩气水平井高产的地质主控因素
Main geological factors controlling high production of horizontal shale gas wells in the Sichuan Basin
摘要
Abstract
The Changning-Weiyuan national shale gas demonstration area in the Sichuan Basin is currently at the stage of large-scale development.Considering the same engineering and technology factors,the research focuses on the main geological factors controlling the high production of horizontal shale gas wells in this area.In this paper,the sedimentary setting of the Lower Silurian Longmaxi Fm in the target layer of the study area was firstly analyzed.Then,based on the 3D seismic data of the study area and the geological and logging data of coring wells,layers in horizontal wells were divided and correlated.Finally,the key reservoir parameters affecting the productivity of shale gas wells were selected and the reservoirs were classified and evaluated comprehensively.Results indicate that the drilling ratio of Type Ⅰ reservoirs has a direct effect on the high production of gas wells.As for the marine shale gas reservoirs in the ChangningWeiyuan area,target location and drilling length of Long I 11 sublayer are the main geological factors controlling the high production of gas wells.Based on these study results,a geological mode of high-production horizontal shale gas wells in this area was proposed.This model can guide the drilling operation effectively,improve the production rate of horizontal shale gas wells and promote scale and economic development of shale gas.关键词
四川盆地/长宁—威远国家级页岩气示范区/页岩气/水平井/产量/早志留世/小层划分/最优靶体位置/Ⅰ类储层/钻遇率Key words
Sichuan Basin/Changning-Weiyuan national shale gas demonstration area/Shale gas/Horizontal well/Production rate/Early Silurian/Layers division/Optimal target location/Type Ⅰ reservoirs/Drilling ratio引用本文复制引用
谢军,赵圣贤,石学文,张鉴..四川盆地页岩气水平井高产的地质主控因素[J].天然气工业,2017,37(7):1-12,12.基金项目
国家科技重大专项“大型油气田及煤层气开发”下属项目“长宁—威远页岩气开发示范工程”(编号:2016ZX05062)、国家重点基础研究发展计划(973计划)项目“中国南方海相页岩气高效开发的基础研究”(编号:2013CB228006). （编号:2016ZX05062）
