【作者】 郭杜军；

【导师】 付广；

【作者基本信息】 东北石油大学 ， 矿产普查与勘探， 2011， 硕士

【摘要】 通过肇41-州58区块三维地震解释资料系统研究,详细分析断裂几何学特征,得到研究区垂向上主要发育下部和中部断层系,上部断层系极少。纵向上呈现多种组合模式,主要有“花状”组合模式和“堑垒”式组合模式。T11反射层发育多方位的断裂密集带,剖面上为‘似花状’和‘V字型’组合模式。T11反射层密集带宽,断裂规模小,带边断裂为部分扶杨油层密集带的边部断裂向上断至葡萄花油层。研究区断裂活动时期共有7期:早白垩世早期、泉头组沉积晚期～青山口组沉积早期、姚家组沉积时期、嫩江组一二段沉积时期,这四个时期为拉张时期;嫩江组末期、明水组末期和古近纪末期为三期强烈的挤压时期。断裂的形成演化先后经历了火石岭～营城组时期的伸展变形;登娄库组～嫩一、二段沉积时期主要发生张扭变形;嫩三段～第四系时期受NWW向压扭应力场作用主要发生反转变形。依据断裂形成时期、变性特征(伸展、张扭和走滑)及形成演化机制,可知研究区共发育6种类型断裂系统:断陷期形成的断裂、拗陷期形成的断裂、反转期形成的断裂、断陷期形成拗陷期持续活动的断裂、断陷期形成拗陷期和反转期均持续活动的断裂、拗陷期形成反转期持续活动的断裂。断陷期形成拗陷期和反转期均活动的断层、拗陷期形成反转期活动的断层为葡萄花油层的主要油源断层类型。在断裂系统划分的基础上,利用研究区多口井数据,进行肇41-州58区块油分布规律及油藏类型研究,得到油藏类型主要有断块油藏、断层遮挡油藏和断层—岩性油藏三种类型。依据断裂系统划分结果、油藏类型及其分布规律以及断层对油气的控制作用将肇41-州58区块断层相关圈闭划分为3种类型:即断块圈闭、断层遮挡圈闭和断层—岩性圈闭。通过断裂对油气成藏的控制作用,肇41-州58区块油气成藏与分布特征,将断裂控藏模式分为三种类型,即源内垂向运移断层遮挡控藏模式、源内先垂向后砂体侧向运移断层遮挡控藏模式和源外垂向运移断层遮挡藏模式。更多还原

【Abstract】 By the study of information system of three-dimensional seismic interpretation in Zhao 41 - 58 block, detailed analysis of the geometry of the fracture, the study area has developed the lower vertical and central fault system, the upper part of the fault system is minimal. Presents a variety combination mode in vertical, there are mainly "flower" combined mode and the "cut-base" type of combined models. T11 reflective layer developed multi-directional fault zone, on the profile there are ’like flower-like’ and ’V shaped’ combination model. Fault dense belt is wide on T11 reflective layer, scale of faults is small, and the faults on the edge of the belt is that some faults on the edge of fault condensed belts of F,y oil layer up to P oil layer.Fault activity period in the study area during the total 7: Early Cretaceous、Late K1q～early K2qn sedimentary period、K2y sedimentary period, K2n1、K2n2 sedimentary period,they are a period of extension ; final K2n sedimentary period、final K2m sedimentary period、final E2y sedimentary period for the three strong squeeze. Faults has gone through the formation and evolution of extensional deformation of K1h～K1sh sedimentary period; mainly transtensional deformation of K1d～K2n1、K2n2 sedimentary period; K2n3～the fourth line was stressed by NWW Field reversal occurs mainly deformation.According to the formation period, the variability features (extension, transtensional and strike-slip) and the formation and evolution mechanism of the fault ,the study area shows that a total of 6 types of fault systems development: the faults formed in faulted period , the faults formed in depression period, the faults formed in reversal period ,the faults formed in faulted period and continuous actives in depression period, the faults formed in faulted period and continuous actives in depression and reversal period, the faults formed in depression period and continuous actives in reversal period. The faults formed in faulted period and continuous actives in depression and reversal period and the faults formed in depression period and continuous actives in reversal period are mainly source fault types in P oil layer.Based on the division of the fault system, through the data of several wells in the study area, to study the the oil distribution and reservoir type of Zhao 41– Zhou 58 block , and the reservoir type mainly are fault block oil reservoir, fault seal oil reservoir and fault - lithology oil reservoir . According to the results of fault system classified, and the distribution of reservoir type and the controlling function of faults to oil and gas will classified the fault-related traps of Zhao 41– Zhou 58 block of to two categories and four types: the fault block trap, the fault sealing trap, the fault-lithologic trap.Though the controlling function of faults to the oil accumulation and the characteristic of oil accumulation and distribution of Zhao 41– Zhou 58 block, reservoir controlling mode of the fault can be divided into three types, namely, the vertical migration and fault sealing reservoir controlling mode in oil source area, the vertical migration and sand lateral migration fault sealing reservoir controlling mode in oil source area, the vertical migration and fault sealing reservoir controlling mode outside of oil source area.更多还原