CAJ | 학술논문

为明确川东北元坝长兴组礁滩储层裂缝特征，通过对多口井长兴组储层裂缝特征的精细刻画和构造、生烃、成岩、孔隙等演化作用的动静态研究指出，裂缝纵向上主要发育于长兴组二段，平面分布非均质性较强，各井区差异性较大，构造相对高部位的裂缝较发育；裂缝类型可细化为3大类、11小类，主要发育3期裂缝，同时建立了典型裂缝标准识别图版及分类评价指标体系；裂缝形成主要受构造、埋藏及溶蚀等作用控制。缝-孔动态配置则表现为裂缝与有效孔隙网状交错配置形成有效储集空间或构建网状立体输导体系，其中第二、第三期缝-孔配置较第一期更好，对储层储渗性能和产能有积极贡献作用。认为元坝长兴组西北部为油气有利富集区。
위명학천동북원패장흥조초탄저층렬봉특정，통과대다구정장흥조저층렬봉특정적정세각화화구조、생경、성암、공극등연화작용적동정태연구지출，렬봉종향상주요발육우장흥조이단，평면분포비균질성교강，각정구차이성교대，구조상대고부위적렬봉교발육；렬봉류형가세화위3대류、11소류，주요발육3기렬봉，동시건립료전형렬봉표준식별도판급분류평개지표체계；렬봉형성주요수구조、매장급용식등작용공제。봉-공동태배치칙표현위렬봉여유효공극망상교착배치형성유효저집공간혹구건망상입체수도체계，기중제이、제삼기봉-공배치교제일기경호，대저층저삼성능화산능유적겁공헌작용。인위원패장흥조서북부위유기유리부집구。
In order to understand the fracture characteristics of reef-bank reservoir in the Changxing Formation in Yuanba area ,northeastern Sichuan Basin ,this paper finely described the fractures of the Changxing Formation in many wells ,and also studied the tectonic evolution ,hydrocarbon generation ,diagenesis and the porosity evolution .Vertically ,the fractures are mainly distributed in the 2nd Member of Changxing Formation .While laterally,they show strong heterogeneity in distri-bution ,with heterogeneity being different in different blocks .Fractures are relatively well developed on structural high . The fractures can be divided into 3 types and 11 subtypes developed mainly in 3 stages.We established the classification evaluation index system and the standard identification chart of typical fractures .The formation of fractures is mainly con-trolled by the tectonic evolution,burial and dissolution.The dynamic fracture-pore assemblages of the 2nd and 3rd stages are better than that of the 1st stage.These assemblages form effective storage space or reticular carrier systems and make a positive contribution to the reservoir property and productivity .The comprehensive analysis indicates that the Changxing Formation in the northwestern Yuanba area is favorable for enrichment of oil /gas.