高校地质学报2017，Vol.23Issue(1)：95-103,9.DOI:10.16108/j.issn1006-7493.2016103
应力环境对克拉苏构造带盐下储层的影响
The Influence of Stress Environment on Reservoir under Salt in Kelasu Structure Belt
摘要
Abstract
There are different structural patten between adjacent well areas under same compression background affected by the different regional stress.However,the structural form also affects the distribution of in-situ stress.Reservoirs of the Bashijiqike Formation in Kelasu thrust belt have strong reservoir heterogeneity,and there are large differences in yield between structural positions in this belt.Research shows that the reservoir is influenced by the magnitude and direction of in-situ stress in addition to the control of sedimentary facies.The Kelasu tectonic belt is divided into oblique compression zone and horizontal compression zone from north to south according to the size and direction of compression stress.The measured stress data show that the oblique compression zone has lower horizontal compression stress,lower vertical stress,and smaller horizontal stress difference than the horizontal compression zone.In order to further verify the accuracy of the measured data,the development of faults,the distribution characteristics of stress and strain in the process of tectonic evolution is simulated using the method of discrete element numerical simulation,based on the seismic interpretation model and constrained by the real drilling data.The result shows that the horizontal compression zone is slightly different from the oblique compression zone in vertical stress,but the horizontal compression zone has stronger horizontal compression stress,about 30％ ～50％ higher than the oblique compression zone.The effect of stress on the reservoir of strong horizontal compression is embodied in reservoir physical property,reservoir space and fracture development degree.The Kela segment which represents the oblique compression zone has low horizontal compression stress,high reservoir physical property,significant erosion phenomenon,less fracture and the reservoir space is dominated by primary pore.The Keshen segment which represents horizontal compression zone has low porosity of reservoir,cracks are extremely developed and the reservoir space is dominated by dissolution enlarge hole,intragranular dissolution pore.A large number of cracks from micro thin,core,FMI imaging,micro seismic detection can be found.The existence of cracks can enhance the connectivity of reservoir and improve the seepage capacity of reservoir.Therefore,it ensures that high and stable production wells in the deep,such as wells of one million cubic meters natural gas output per day in the high stress reservoir over 6000 m deep.关键词
克拉苏构造带/地应力场/离散元数值模拟/巴什基奇克组Key words
Kelasu tectonic belt/in-situ stress field/discrete element numerical simulation/Bashijiqike Formation分类
天文与地球科学引用本文复制引用
唐雁刚,周鹏,徐振平,尹宏伟,朱文慧,谢亚妮..应力环境对克拉苏构造带盐下储层的影响[J].高校地质学报,2017,23(1):95-103,9.基金项目
国家重大专项(2016ZX05003-004):中国石油天然气股份公司专项(2014E-2101) （2016ZX05003-004）
国家自然科学基金项目(41272227 （）
41572187) （）
