松辽盆地三肇凹陷州401区块扶余油层沉积特征及成藏规律研究
发布时间：2018-10-08 13:37
【摘要】：三肇凹陷是松辽盆地重要的油气富集区,为大庆油田的稳产做出了巨大贡献,而扶余油层作为油气产能的接替层位,对它的勘探评价显得日益重要。目前扶余油层具有探明储量动用率低、钻井成功率低的特点,造成这种状况的主要原因是对扶余油层的沉积特征及成藏规律了解不够明确,论文针对此勘探现状,选取三肇凹陷州401区块作为研究区,在全面收集区内测井、录井、岩心、试油、三维地震等资料的基础上,对构造特征、沉积特征、构造演化特征、油气运聚规律及成藏模式等进行深入剖析,取得的主要成果如下:(1)通过对钻井、测井及地震等资料的分析研究,结合区域地质情况及前人研究成果,将研究区扶余油层划分为5个短期旋回,分别对应FⅢ、FⅡ、FⅠ3、FⅠ2、FⅠ1油层组。(2)通过三维地震精细解释,刻画了三肇凹陷内T2张性断裂系统的平、剖面特征,并根据扶余油层各油层组的底、顶面构造特征分析其沉积充填特征,从而明确了扶余油层的构造沉积演化特征。(3)通过对测井相、岩心相及地震相的分析,对扶余油层各油层组的沉积相展布及沉积环境进行研究,并利用波阻抗反演的方法对各油层组的砂体分布状况进行预测,明确了FⅢ、FⅡ、FⅠ3、FⅠ2油层组主要发育浅水三角洲平原亚相沉积,FⅠ1油层组主要发育三角洲前缘亚相沉积,分流河道的发育对于砂体的展布起着明显的控制作用。(4)通过对构造演化特征、构造变形特征、断层活动特征及各成藏事件的综合分析,揭示了构造演化对成藏的控制作用,确定扶余油层成藏的关键时期为嫩江组末期和明水组末期,并对各期油气运聚规律进行深入分析,阐明了油藏动态变化过程。(5)通过对嫩江组末期及明水组末期成藏特征及油藏动态变化规律的分析,深入探讨不同断层在不同时期对成藏所起到的作用,揭示了断层对成藏的控制作用。并将断层分为两类,即继承性发育的大规模断层和仅发育于T2轴附近的小规模断层。大规模断层在嫩江组末期对成藏起到促进作用,在明水组末期起到一定的破坏作用;小规模断层在两个成藏关键时期均起到促进作用,因此确定小规模断层为利于扶余油层成藏的“有利断层”。(6)通过对扶余油层成藏条件、油水分布规律、动态成藏过程的研究,建立了3种成藏模式:地垒式成藏、阶梯式成藏及地堑式成藏。并结合“有利断层”研究成果,识别出3类油气富集区,最终预测出有利成藏区。
[Abstract]:Sanzhao depression is an important oil and gas accumulation area in Songliao Basin, which has made a great contribution to the stable production of Daqing Oilfield. As a replacement of oil and gas productivity, Fuyu reservoir is becoming increasingly important for its exploration and evaluation. At present, Fuyu reservoir has the characteristics of low proven reserve production rate and low drilling success rate. The main reason for this situation is that the sedimentary characteristics and reservoir forming rules of Fuyu reservoir are not clear enough. Selecting Block 401 of Sanzhao Sag as the study area, on the basis of collecting the data of logging, core, oil testing and 3D earthquake, the structural characteristics, sedimentary characteristics and structural evolution characteristics are analyzed. The main results obtained are as follows: (1) through the analysis of drilling, logging and seismic data, combined with regional geological conditions and previous research results, The Fuyu oil layers in the study area are divided into five short-term cycles corresponding to the F 鈪，
本文编号：2256946
[Abstract]:Sanzhao depression is an important oil and gas accumulation area in Songliao Basin, which has made a great contribution to the stable production of Daqing Oilfield. As a replacement of oil and gas productivity, Fuyu reservoir is becoming increasingly important for its exploration and evaluation. At present, Fuyu reservoir has the characteristics of low proven reserve production rate and low drilling success rate. The main reason for this situation is that the sedimentary characteristics and reservoir forming rules of Fuyu reservoir are not clear enough. Selecting Block 401 of Sanzhao Sag as the study area, on the basis of collecting the data of logging, core, oil testing and 3D earthquake, the structural characteristics, sedimentary characteristics and structural evolution characteristics are analyzed. The main results obtained are as follows: (1) through the analysis of drilling, logging and seismic data, combined with regional geological conditions and previous research results, The Fuyu oil layers in the study area are divided into five short-term cycles corresponding to the F 鈪，
本文编号：2256946
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