礁滩型油气成藏要素和塔中实例浅析  

REEF COMPLEX AS POTENTIAL OIL AND GAS RESERVOIR:METHODS AND A CASE STUDY IN THE TAZHONG UPLIFT,TARIM BLOCK

作　　者：蔡习尧[1] 张智礼 李越[2] 李启剑[2] 马俊业[2] 张园园[2] 姚小刚[2] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2011年第1期31-40,共10页Journal of Stratigraphy

基　　金：中国科学院创新工程方向性项目(KZCX2-YW-Q05-01;KZCX2-YW-122);国家自然科学基金项目(No.41072002;40532009)

摘　　要：礁滩复合体油气成藏分析涉及到层序单元识别、生烃过程、孔隙类型和盖层圈闭这几个要素,这些因子受控于海平面变化、沉积古地理、成岩作用和构造演化史。塔中隆起区上奥陶统良里塔格组的大型礁滩体油气藏的构成是这些因素优化组合的结果,塔中北台缘Ⅰ号波折带临近满加尔凹陷的烃源岩区,,浅水台地边缘形成数期生物礁和高能滩复合体,也是良里塔格组末期海退所形成的客斯特不整合面的集中地带,桑塔木组粉砂岩和泥岩构成了理想的盖层。顺6井具有埋深大、形成早、多期充注的成藏特点,经历多次构造调整过程后,坡折带成为控油控储的关键部位。Reef complexes are ideal oil and gas reservoirs because of their high porosities. The key elements in the analysis of reef complex reservoirs include the identification of sequence units, analysis of hydrocarbon history of source rocks, and characterization of porosities. The development of reef complex reservoirs is controlled by sea-level changes, sedimentary paleogeography, diagenesis, and tectonic evolution of the basins. The huge oil reservoirs in the Upper Ordovieian Lianglitag Formation in the Tazhong Uplift are prime examples of reef complex reservoirs. A case study of the Well Shun 6 shows that the Lianglitag reservoirs were formed during deep burial and characterized by multiple periods of hydrocarbon filling. Multiple tectonic events resulted in the concentration of oil and gas in the slope-break belt.

关 键 词：礁滩复合体 油气储集 良里塔格组 奥陶系 塔里木盆地 新疆 

分 类 号：P534.42[天文地球—古生物学与地层学]