黄骅坳陷叶三拨地区孔店组至沙河街组沉积相特征与有利储层分析

发布时间：2018-06-18 22:38

  本文选题：叶三拨地区 + 沙河街组　； 参考：《成都理工大学》2015年硕士论文

【摘要】：叶三拨油田主体位于南皮县段六拨乡,区域构造位置位于黄骅坳陷南区沧东裙边构造带的舍女寺断鼻南翼,勘探面积123km2。该地区北、东分别与舍女寺、段六拨油田相接,南邻南皮凹陷,西为沧县隆起,东北部通过孔东大断层与王官屯油田相连,构造位置相当有利。经多年的勘探开发证实其油气资源丰富,成藏条件优越,钻探显示孔店组-沙河街组中发育多套含油层系。随着增产增收的需要和对油藏的进一步潜挖技术的提高,研究区进入高含注水开发的阶段,同时面临如下问题,一是研究区域内发育较多断层,对油藏控制因素影响较大,二是研究区内含油层系较多,并由于断层控制因素和中深层埋深因素而产生许多隐蔽性油藏与断块油藏,三是研究区内岩性发育多样性,从孔店组到沙河街组发育各种不同岩性,其岩相与沉积相演化规律较繁杂,但同时生烃岩与有效储层厚度较大,分布广,具有很好的开发前景。四是基础地质研究程度低,在此前缺乏详细的层序地层划分与沉积体系域划分研究。根据前人资料的统计结果,目前叶三拨研究区内地震资料比较丰富完整,并覆盖整个研究区域309km2左右,研究区内井位数150口左右,其中探井大约有40口。油田内部多开发井,井控较好,测井数据与岩性数据较全,外部探井较多,资料较齐。共有钻取芯井30口,取心总进尺977.21m,岩心总长905.98m,总收获率为92.7%。在此之前,(李艳伟,2013)对研究区孔二段做过沉积相研究,(马少妍,2013)对于研究区做过有利圈闭综合评价,但是仅限于开发小层对比模式的研究.本次论文运用层序地层学,地震地层学,沉积岩石学与岩相古地理基本理论指导,通过地震时间切片(地震剖面)响应特征,地质岩性资料与优选测井数据,在对应层划分的控制基础上,结合开发地质的小层对比原则与层序地层划分标准,区分和划分研究区高精度等时小层对比-层序地层界面。将孔店组自下而上划分出1个超长期(Ⅱ级)旋回(SSC1)、4个长期(Ⅲ级)旋回(LSC1-LSC4)、12个中期(Ⅳ级)旋回(MSC1-MSC12),沙河街组自下而上划分出1个超长期(Ⅱ级)旋回(SSC2)、3个长期(Ⅲ级)旋回(LSC5-LSC7)、8个中期(Ⅳ级)旋回(MSC13-MSC20),及相应级别体系域。在研究区层序地层和沉积相研究的基础上,建立了叶三拨地区孔店组-沙河街组的IV级层序地层格架。在层序格架内,以岩性资料为依据,结合测井曲线响应特征及地震响应特征分析资料,确立单井微相标志,明确单井沉积微相类型。并绘制了连井地层及沉积微相对比剖面图及砂体厚度等值线平面图,砂地比等值线图和沉积微相平面图,在IV级层序地层格架内标定并描述了单砂体的分布特征以及沉积相演化特征。同时分析层序地层与沉积相控制下的有效储层岩性分布,为研究区进一步的开发生产提供基础地质技术支持。
[Abstract]:The main body of Yesanpo Oilfield is located in Liupaoxiang, Nanpi County, and the regional structure is located in the south wing of Shanusi fault nose of Cangdong skirt structural belt in the southern part of Huanghua depression. The exploration area is 123km2. The north and east of the area are connected with the Shenusi oil field respectively, the south is adjacent to the Nanpi depression, the west is Cangxian uplift, and the northeast is connected with the Wangguantun oil field through the Kongdong fault, the tectonic position is quite favorable. After many years of exploration and development, it has been proved that it is rich in oil and gas resources, and its reservoir forming conditions are superior. The drilling shows that there are many sets of oil-bearing strata developed in Kongdian formation and Shahejie formation. With the need of increasing production and income and the improvement of further subsurface digging technology for reservoirs, the research area has entered the stage of high content water injection development. At the same time, it faces the following problems: first, more faults are developed in the study area, which have a great influence on reservoir control factors. Second, there are many oil-bearing strata in the study area, and many hidden reservoirs and fault-block reservoirs are produced because of fault control factors and buried depth factors in the middle and deep layers. Third, the development diversity of lithology in the study area. From Kongdian formation to Shahejie formation, various lithologies are developed. The evolution rules of lithofacies and sedimentary facies are complicated, but at the same time hydrocarbon generating rocks and effective reservoirs are thicker and widely distributed, so they have a good development prospect. Fourth, the basic geological research degree is low, lack of detailed sequence stratigraphic division and sedimentary system tracts division research before. According to the statistical results of previous data, the seismic data in Yesanpo study area is relatively rich and complete, covering the whole research area 309km2 or so. The number of wells in the study area is about 150, of which there are about 40 exploration wells. The well control is better, the logging data and lithologic data are complete, and the external exploration wells are more uniform. A total of 30 coring wells were drilled, with a total coring scale of 977.21 m, a total core length of 905.98 m and a total yield rate of 92.7 m. Prior to this, Li Yanwei (Li Yanwei 2013) has done sedimentary facies research on the second member of the pore in the study area (Ma Shaoyan 2013) has made a comprehensive evaluation of favorable traps for the study area, but it is only limited to the study of the development of a small layer correlation model. Based on the basic theories of sequence stratigraphy, seismostratigraphy, sedimentary petrology and lithofacies and paleogeography, this paper uses seismic time slice (seismic section) response characteristics, geological lithology data and selected logging data. On the basis of the control of corresponding stratigraphic division, combined with the correlation principle of development geology and the standard of sequence stratigraphic division, the high precision isochronous small layer correlation and sequence stratigraphic interface of the study area are distinguished and divided. The Kongdian formation was divided into one super-long (鈪，

本文编号：2037108