摘要
塔里木盆地三顺地区志留系柯坪塔格组优质储层是该区油气勘探的关键。综合运用岩心分析、铸体薄片观察、阴极发光、环境扫描电镜及能谱分析、包裹体测温等手段,研究柯坪塔格组储层岩石特征、孔隙成因类型、孔隙演化期次,结合沉积成岩,综合分析了优质储层的控制因素。研究认为,柯下段低能淤泥质滨岸沉积了一套成分和结构成熟度都比较低的岩屑砂岩,在成岩过程中受压实作用影响强烈,孔隙以残余粒间孔为主,储层物性受沉积相和压实成岩作用双重控制;柯上段砂质滨岸砂体纵横向连通性好,溶蚀作用很好地改善了储层物性,最后一期次生溶蚀孔隙对储层物性贡献大。
High-quality reservoirs in the Silurian Kepingtage Formation play an important role in oil and gas exploration in the Sanshun area ol Tarim Basin. The reservoir rock characteristics,pore type and pore evolution stage ol the Kepingtage Formation were studied in detail using core analysis, thin section observation, cathode luminescence, ESEM, EDS, and inclusion temperature. The controls ol high quality reservoirs were identified and combined with sedimentary and diagenetic analyses. The research suggested that lithic sandstones with low compositional and textural maturities were deposited in the low-energy muddy nearshore ol the lower Kepingtage Formation,and then strongly impacted by compaction. Hence they were dominated by residual intergranular pores. Reservoir properties were controlled by sedimentary lacies and compaction. Porosity in the sandy shore sand in the upper Kepingtage Formation was well connected laterally and longitudinally. Dissolution improved reservoir properties,and the last phase ol secondary dissolution contributed greatly to reservoir quality.
作者
张福顺
张旺
Zhang Fushun;Zhang Wang(SINOPEC Petroleum, Exploration and Production Research Institute, Beijing 100083,China;State Key Laboratory of Petroleum, Resources and Protecting, China University of Petroleum （ Beijing）, Beijing 102249, China)
出处
《石油实验地质》
CAS
CSCD
北大核心
2017年第6期770-775,共6页
Petroleum Geology & Experiment
基金
中国石化科技部项目"塔里木志留系油气富集主控因素及勘探方向"(P12003)资助
