现代地质2009，Vol.23Issue(5)：843-851,9.
鄂尔多斯盆地沿河湾探区低渗储层长61构造裂缝主要形成期应力环境判识
Palaeostress Judgement of Tectonic Fractures in Chang 61 Low Permeable Reservoir in Yanhewan Area, Ordos Basin in Main Forming Period
摘要
Abstract
It must be definitely replied to the forming time of tectonic fracture in reservoirs and the state of palaeostress in estimating and predicting work. According to the method of acoustic emission (AE) palaeostress measurement, the effective percentage of the maximum principal stress can be concluded in the history of palaeo-structure.The AE measurements reveal that the corresponding maximum principal stress is in the range of 80 to 98 MPa in Chang 6_1 low permeable reservoir of Upper Triassic in Yanhewan area, Ordos Basin.Based on the result of palaeostress stage,the thermometry measurement of fracture filling inclusion and the evolution characteristics of regional stress field, it can be confirmed that the tectonic fractures form at Yanshanian movement.By the measurement of the strain of the conjugated fissures located in the outcrop area or the overlay area, the triaxial stress state in Yanshanian is resumed in this area.The direction of the maximum principal stress is NW-SE direction, predominant direction is 129°∠10°, the predominant direction of the minimum principal stress is 36°∠7°, the intermediate principal stress is approximate vertical.Those results can provide some references for prediction of tectonic fracture in low permeability reservoirs.关键词
裂缝形成期/构造应力环境/长6_1低渗储层/沿河湾探区/鄂尔多斯盆地Key words
the period of tectonic fracture forming/the condition of palaeostress/Chang 6_1 low permeable reservoir/ Yanhewan explorative area/Ordos Basin分类
能源科技引用本文复制引用
周新桂,张林炎,黄臣军,刘格云,万晓龙,鄢犀利..鄂尔多斯盆地沿河湾探区低渗储层长61构造裂缝主要形成期应力环境判识[J].现代地质,2009,23(5):843-851,9.基金项目
中国石化华北分公司科研项目(P02077-2,HBK2004-2) （P02077-2,HBK2004-2）
中国石油长庆油田分公司科研项目"安塞沿河湾、吴旗地区长6储层裂缝特征和分布规律研究". （）
