SEISMIC REFLECTION CHARACTERISTICS OF HALITE AND RELATED HYDROCARBON ACCUMULATION TYPES OF THE WENLIU OILFIELD IN THE DONGPU SUBBASIN
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摘要: 利用地震资料, 结合地质、钻井资料, 对东濮凹陷文留地区盐岩的物理性质、地震反射特征、几何形态、与盐岩相关油气藏的类型进行了研究。发现盐岩具有密度恒定特性(低密度)和速度稳定特性(高速度), 基本不随深度变化。盐岩与砂泥岩体之间有较强的波阻抗差, 因而其界面反射特征明显。但盐岩的流动特性造成盐岩体有多种赋存状态, 它们的地震反射特征各不相同, 这是盐岩解释的主要困难。利用地震资料识别归纳出盐层(体)解释判定模式, 认为本区盐岩主要有3种赋存状态:原生板状盐岩、后生变形盐岩和次生盐墙。盐岩流动变形及相变形成了3类油气藏:盐上堑式背斜油气藏、盐侧向封堵油气藏和盐下盐背斜油气藏。Abstract: The physical properties, seismic reflection features, geometry and halite-related hydrocarbon accumulation types in the Wenliu oilfield of the Dongpu subbasin were studied by using seismic reflection data, combined with geological and drilling data.The studies show that halite is characterized by a constant low density low and a high stable velocity, which in the main do not change with depth.The boundary between halite and areno-argillaceous rocks show distinct reflection features because there is a strong impedance difference between them.However, due to the flow feature, halite has several modes of occurrence and their seismic reflection features are different, which makes it difficult to recognize halite. A discrimination model for halite beds (bodies)has been summarized by using seismic data.There are three main modes of occurrence for halite in the study area:primary platy halite, post-deformational halite and secondary salt wall.The flow deformation and facies change of halite formed three types of hydrocarbon accumulations, namely, graben-type anticlinal accumulations above salt, lateral salt-sealed accumulations and anticlinal accumulations below salt.
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图 2 文留油田不同岩性速度-深度变化特征
Figure 2. Velocity versus depth of different lithologies in the Wenliu oilfield
图 3 东濮凹陷文留油田盐岩地震反射特征
Figure 3. Seismic reflection feature of halite in the Dongpu depression of the Wenliu oilfield
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[1] 中国石油学会石油地质委员会.碎屑岩沉积相研究[M].北京:石油工业出版社, 1988:272～ 286. [2] 陆荣生, 赵春元, 陈树文, 等.中国石油地质志(卷7, 中原油田)[M].北京:石油工业出版社, 1995:35～ 43. [3] 纪友亮, 冯建辉, 王声朗, 等.东濮凹陷沙三段高频湖平面变化及低位砂体预测[J].高校地质学报, 2003, 9 (1):99～ 110. doi: 10.3969/j.issn.1006-7493.2003.01.012 [4] 梁宏斌, 朱光有, 张水昌, 等.冀中坳陷晋县凹陷下第三系断陷湖盆的演化与烃源岩的形成[J].石油实验地质, 2005, 27 (6):583～ 586. doi: 10.3969/j.issn.1001-6112.2005.06.006 [5] 屈红军, 李文厚, 苗建宇.东濮凹陷濮卫洼陷盐岩发育规律及成因探讨[J].中国地质, 2003, 30 (3):309～ 314. doi: 10.3969/j.issn.1000-3657.2003.03.014 [6] 向树安, 凌庆珍, 涂水江, 等.江汉油田盐间非砂岩储层的特征及裂缝的成因[J].地质力学学报, 2006, 12 (4):462～ 468. doi: 10.3969/j.issn.1006-6616.2006.04.009 [7] 闫东育, 张同兴, 黄国平.东濮凹陷沙三段盐丘浅析[J].石油勘探与开发, 2001, 28 (6):99～ 100. doi: 10.3321/j.issn:1000-0747.2001.06.030 [8] 云金表, 赵利华.东营凹陷中央隆起带构造特征、沙箱模拟与形成机制研究[J].地质力学学报, 2003, 9 (2): 113～ 121. doi: 10.3969/j.issn.1006-6616.2003.02.003 [9] 王彬, 史军.东濮凹陷沙三段盐岩层对油气成藏的影响[J].西部探矿工程, 2005, (4):67～ 68. doi: 10.3969/j.issn.1004-5716.2005.04.036 [10] 刘晓峰, 解习农.与盐构造相关的流体流动和油气运聚[J].地学前缘, 2001, 8 (4):343～ 348. doi: 10.3321/j.issn:1005-2321.2001.04.014 [11] 贾承造, 赵文智, 魏国齐.盐构造与油气勘探[J].石油勘探与开发, 2003, 30 (2):17～ 19. doi: 10.3321/j.issn:1000-0747.2003.02.003 -
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