张东地区白云岩裂缝发育特征及分布规律研究
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摘要
大港油田张东地区沙一下段发育一套白云岩、泥灰岩和油页岩互层沉积,裂缝相对发育。目前,该区已进入开发方案实施准备阶段,需要落实裂缝发育特征及分布规律。根据钻井资料,明确了白云岩储层的宏观展布规律,再利用岩心资料分析、阴极发光及铸体薄片等技术手段分析了白云岩的孔隙类型和裂缝发育形态,最后利用叠前地震各向异性和应力场模拟两种技术手段,预测了裂缝分布规律。裂缝分布预测结果与试油结果吻合程度很高,证实了研究成果的可靠性。
A set of dolomite, marl and oil shale developed on Es1 formation in Zhangdong district, and the fractures were well developed. At present, the region has entered the preparatory stage of the development plan implementation, it's necessary to make clear the characteristics of special reservoirs and the fracture distribution regularity. Based on drilling data, the macroscopic distribution regularity of dolomite reservoirs was made clear. By using core data analysis, cathode luminescence and the casting thin sections and other technical means, the dolomite pore type and crack development pattern were analyzed. In the end, the pre-stack seismic anisotropy and stress field were used in process of studying the fracture distribution. The predicted results of the fracture distribution had a high agreement degree with the oil production test, which proved the reliability of the research results and provided a good technical support for the development plan implementation.
A set of dolomite, marl and oil shale developed on Es1 formation in Zhangdong district, and the fractures were well developed. At present, the region has entered the preparatory stage of the development plan implementation, it's necessary to make clear the characteristics of special reservoirs and the fracture distribution regularity. Based on drilling data, the macroscopic distribution regularity of dolomite reservoirs was made clear. By using core data analysis, cathode luminescence and the casting thin sections and other technical means, the dolomite pore type and crack development pattern were analyzed. In the end, the pre-stack seismic anisotropy and stress field were used in process of studying the fracture distribution. The predicted results of the fracture distribution had a high agreement degree with the oil production test, which proved the reliability of the research results and provided a good technical support for the development plan implementation.
引文
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[3]董新秀,邵先杰,武泽,等.苏北盆地金湖凹陷碳酸盐岩孔隙类型及孔隙结构特征[J].石油地质与工程,2014,28(5):90–94.
[4]贾俊,孟云涛,孟军田,等.大牛地气田奥陶系风化壳气藏裂缝发育特征及影响因素[J].石油地质与工程,2016,30(1):32–36.
[5]赵明,樊太亮,于炳松,等.塔中地区奥陶系碳酸盐岩储层裂缝发育特征及主控因素[J].现代地质,2009,23(4):700–718.
[6]李北康,胡作维,李云,等.川中下寒武统龙王庙组白云岩阴极发光特征与成岩流体[J].石油地质与工程,2016,30(2):28–31.
[7]耿福兰.南堡2号潜山碳酸盐岩储层叠前和叠后裂缝综合预测[J].石油物探,2013,52(1):89–96.
[8]熊兴银,杨茂智,许建洋,等.基于全方位OVT地震数据的各向异性裂缝预测技术在迪北致密砂岩研究中的应用[J].石油地质与工程,2016,30(1):65–68.
[9]蒋春玲,刘文卿,谢春辉,等.叠前全方位裂缝预测方法应用研究[J].石油地质与工程,2015,29(6):72–75.
[10]杨勤勇,赵群,王世星,等.纵波各向异性及其在裂缝检测中的应用[J].石油物探,2006,45(2):177–181.
[11]魏周拓,范宜仁,陈雪莲.横波各向异性在裂缝和应力分析中的应用[J].地球物理学进展,2012,27(1):217–224.
[12]丁文龙,樊太亮,黄晓波,等.塔里木盆地塔中地区上奥陶统古构造应力场模拟与裂缝分布预测[J].地质通报,2011,30(4):588–594.
[13]刘聪,黄晓波,樊太亮,等.塔中地区奥陶系现今构造应力场模拟及裂缝预测[J].新疆石油地质,2008,29(4):475–477.
[14]狄贵东,孙赞东,庞雄奇,等.应力场模拟约束下的碳酸盐岩裂缝综合预测[J].石油物探,2016,55(1):150–156.