中国地质调查2023，Vol.10Issue(6)：25-30,6.DOI:10.19388/j.zgdzdc.2023.06.03
桂中—南盘江地区黔水地1井打屋坝组页岩储层含气性及可压性评价
Gas bearing and compressibility evaluation of shale reservoir in Dawuba Formation of Qianshuidi 1 Well in Guizhong-Nanpanjiang area
摘要
Abstract
The stable shale gas flow was obtained during vertical well drilling of Qianshuidi 1 Well in Guizhong-Nanpanjiang area,meaning the good marine shale gas was discovered in Carboniferous Dawuba Formation.Based on the drilling,logging,well logging,analysis and testing data,the authors in this paper comprehensively studied the lithofacies,organic geochemistry,physical properties,fracture development and gas bearing of Dawuba For-mation shale reservoir,and explained the gas bearing and compressibility of shale reservoir in the study area.The results show that:① Dawuba Formation consists of a set of huge thick shale system which is from the lower slope subfacies of carbonate slope facies to the huge thick shale series of platform basin facies,and Good to high-qual-ity source rock are well developed in the middle lower part of the third member and the upper part of the first member,with developed natural fractures.The maximum value of total hydrocarbon in gas logging is 63.41%,and the average value of desorption gas is 1.08 m3/t,with good shale gas generation conditions and resource po-tential.②The total content of brittle minerals in the main gas bearing intervals is 31%～94%,and the average Poisson's ratio is 0.31.The average bulk modulus of elasticity is 27.2 GPa,and the fracture pressure is between 29.7 MPa and 48.5 MPa.This set of strata has good fracture potential and fracture retention ability,which means the complex fracture networks would be easily formed under large-scale volumetric fracture.Besides,the set of strata has high pressure and meets the conditions for fracturing to form industrial production capacity,making it a target layer for further exploration and development.关键词
黔水地1井/打屋坝组/页岩气/含气性/可压性Key words
Qianshuidi 1 Well/Dawuba Formation/shale gas/gas bearing/compressibility分类
天文与地球科学引用本文复制引用
郭军,苑坤,郭经纬,陈相霖,李岩..桂中—南盘江地区黔水地1井打屋坝组页岩储层含气性及可压性评价[J].中国地质调查,2023,10(6):25-30,6.基金项目
中国地质调查局"桂中—南盘江页岩气地质调查(编号:DD20190088)"项目资助. （编号:DD20190088）
