摘要
库车坳陷KS2气田目的层构造裂缝普遍发育,而位于不同构造位置的裂缝发育特征有所差异,其与储层砂体的发育特征共同控制了该区单井产能的高低。综合利用岩心、薄片、扫面电镜、测井以及电成像测井解释资料,对库车坳陷KS2气田目的层巴什基奇克组的储层岩石学特征、砂体组合特征以及裂缝的性质、开度、填充性等特征进行了分析,并对砂体和裂缝发育特征对单井产能的影响进行了研究。结果表明研究区单井初期产能受优质砂体发育程度、裂缝走向、填充度、开度以及储层改造类型等多个因素的共同作用。位于断背斜高部位和二级断层共同控制区裂缝走向多样,平面沟通成网,单井产能往往较高;单纯构造高部位控制区因裂缝产状单一,经压裂改造并沟通有效裂缝后才能获得高产;线状背斜翼部和鞍部区裂缝发育程度低,有效性差,同等砂体条件下产能较低。
Tectonic fractures are widespread in the KS2 gasfield and the fracture development characteristics differ with the structure locations.The single-well production in this area is controlled by the features of the sandstone and fractures.In this study,we determined the lithological characteristics,sand combination features and properties such as the degree,filling and occurrence of the fractures in the reservoir through analyzing the cores,slices,SEM and well-log data.Besides,we analyzed the relations between the well production and aforementioned sand and fracture features.The results show that the well production is affected by many factors of the property of the sand and fractures:wells located in the areas controlled by both faults and anticline have higher production,as indicated by routine test or acidification test;fractures with single direction are usually widespread in the anticline-controlled areas,and the wells there need to be tested by artificial hydraulic fracturing to obtain higher yield;fractures are poorly-developed in areas such as limbs and axis of the anticlines,and the wells there usually have low productivity.
作者
付小涛
王益民
邵剑波
朱松柏
王勇
聂延波
王斌
段琪琪
FU Xiaotao;WANG Yimin;SHAO Jianbo;ZHU Songbai;WANG Yong;NIE Yanbo;WANG Bin;DUAN Qiqi(Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China)
出处
《现代地质》
CAS
CSCD
北大核心
2021年第2期326-337,共12页
Geoscience
关键词
致密砂岩储层
砂体
裂缝
产能
发育特征
库车坳陷
tight sandstone gas reservoir
sandstone
fractures
productivity
developmental characteristics
Kuqa Depression
