玛东2斜坡区二叠系不整合面与油气成藏关系探讨
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摘要
针对玛东2井区源边—不整合—斜坡的地质特点,综合地震、地质、测井资料对玛东2斜坡区二叠系不整合面进行了识别,以不整合面为框架,建立了研究区地层结构模式。在此模式下对已发现油藏进行了再认识,分析了生、储、盖的配置关系,探讨了不整合面与油气成藏的关系。认为研究区二叠系存在5期不整合面,两种不整合面类型;不整合面不仅控制了地层结构、接触关系、展布特征和圈闭类型,还控制了油气的运移,最终控制油气的富集;玛东2井区油藏为地层超覆油藏,为源边—不整合—斜坡成藏模式。
Madong 2 well area is characterized by a geological form of source side-unconformity-slope.In this paper,the Permian unconformity surface in Madong 2 Slope is recognize by seismic,geological and well-logging data;and then,a pattern of stratigraphic structure is established in terms of unconformity surface;the discovered oil reservoirs are restudied based on the pattern;and the association of source rock,reservoir and caprock is also analyzed;and the relationship between unconformity source and reservoir forming is discussed.Results show that(1) there are five stages and two types of unconformity surfaces for the Permian;(2) the surfaces control not only the stratigraphic structure,contact relationship,distribution and trap type but also the hydrocarbon migration and accumulation;(3) oil reservoir in Madong 2 well area is a stratigraphic overlap one,with a reservoir-forming pattern of side source-unconformity-slope.
Madong 2 well area is characterized by a geological form of source side-unconformity-slope.In this paper,the Permian unconformity surface in Madong 2 Slope is recognize by seismic,geological and well-logging data;and then,a pattern of stratigraphic structure is established in terms of unconformity surface;the discovered oil reservoirs are restudied based on the pattern;and the association of source rock,reservoir and caprock is also analyzed;and the relationship between unconformity source and reservoir forming is discussed.Results show that(1) there are five stages and two types of unconformity surfaces for the Permian;(2) the surfaces control not only the stratigraphic structure,contact relationship,distribution and trap type but also the hydrocarbon migration and accumulation;(3) oil reservoir in Madong 2 well area is a stratigraphic overlap one,with a reservoir-forming pattern of side source-unconformity-slope.
引文
1陈建平,查明,柳广弟,等.准噶尔盆地西北缘斜坡区不整合面在油气成藏中的作用[J].石油大学学报,2000,24(4):75-78.
2赵卫军,王小娥,陈勇,等.准噶尔盆地陆梁隆起西部地区油气沿不整合面运移的规律[J].天然气勘探与开发,2007,30(2):5-11.
3吴孔友,查明,柳广弟.准噶尔盆地二叠系不整合面及其油气运聚特征[J].石油勘探与开发,2002,29(2):53-56.
4付广,许泽剑,韩冬玲,等.不整合面在油气藏形成中的作用[J].大庆石油学院学报,2001,25(1):1-5.
2赵卫军,王小娥,陈勇,等.准噶尔盆地陆梁隆起西部地区油气沿不整合面运移的规律[J].天然气勘探与开发,2007,30(2):5-11.
3吴孔友,查明,柳广弟.准噶尔盆地二叠系不整合面及其油气运聚特征[J].石油勘探与开发,2002,29(2):53-56.
4付广,许泽剑,韩冬玲,等.不整合面在油气藏形成中的作用[J].大庆石油学院学报,2001,25(1):1-5.
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