【摘要】 礁滩相带是碳酸盐岩油气勘探的有利沉积相带,弄清台内礁滩相带的分布和演化规律,对塔中地区台地内部油气勘探具有重要的意义。通过宏微观资料,利用测井曲线与地震相结合手段,对不同层段内岩性与沉积微相特征进行精细识别,对中古51井区良里塔格组沉积相纵横向分布变化规律进行详细分析并建立礁滩相带迁移演化模式。认为中古51井区沉积相以灰泥丘、台内滩和滩间海为主,台内点礁和生屑滩相次之;中古51井区台内礁滩相带在良里塔格组三段-二段沉积早期形成,平面上分布在塔中10号带附近,台缘礁滩相带形成于良里塔格组二段沉积晚期-一段沉积时期,沿塔中Ⅰ号带分布。总体上,礁滩相带具有由下至上,从台内向台缘逐步迁移演化的特征。更多还原

【Abstract】 Reef and shoal facies was a favorable facies belt of carbonate oil and gas exploration,to clarify the distribution and evolutionary pattern of intra-platform reef and shoal had great significance for carbonate oil and gas exploration in Tazhong Area.Through analysis of macroscopic and microscopic data,in combination of logging data with seismic data,the characteristics of lithology and sedimentary microfacies in different layers were recognized,to the longitudinal and transverse distribution changes sedimentary facies were analyzed and variation pattern in Lianglitage Formation of Wellblock Zhonggu 51 was established.It was considered that in the wellblock the mud mound,intra-platform shoal and interbank sea are the major sedimentary facies,and the intra-platform reef and bioclastic banks are next.The intra-platform reef and shoal are formed early in 3-2 members of Lianglitage Formation,and it is distributed near the Tazhong No.10 Zone.And the high energy zone of marginal-platform reef and shoal are formed at the late stage of the 2nd member to 1st member of Lianglitage Formation,and it is distributed along Tazhong No.ⅠZone.On the whole,the reef and shoal facies has gradual evolutionary characteristics of from the bottom to the top and from intra-platform to marginal-platform.更多还原