渤海湾盆地石臼坨凸起Q油田沙一二段储集层特征及控制因素
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摘要
为精细评价低渗储层,降低油田开发风险,针对油田范围内储层岩性复杂、低孔低渗等特点,通过岩心、铸体薄片、阴极发光、扫描电镜以及ECS测井等资料对沙一二段储层的岩性、储集空间类型、储层物性及其主要控制因素进行了系统分析,在此基础上对储层进行了评价。综合研究认为:(1)储层发育火山角砾岩、凝灰质砂砾岩、砂砾岩、碳酸盐岩、混积岩、灰质砂岩等6个岩性段,储集空间类型以次生孔隙为主,孔隙度分布于5.1%～34.6%,渗透率分布于0.15～340 mD;(2)沉积作用和成岩作用是控制研究区内储层物性主要因素;(3)将低渗储层划分为了3类,Ⅰ类储层主要为混积岩,溶蚀孔最为发育,孔隙度大于15%,渗透率大于6.5 mD,是开发动用的"甜点"。以上成果认识对油田高效开发具有重要指导意义。
For the reservoir fine evaluation, and reduce the oilfield development risks, on the problem of the characteristics of lithofacies diversity, complicated diagenesis, low porosity and permeability, based on the identification of cast slice, cathode luminescence, scanning electron microscopy, X-ray scattering techniques and mercury injection data, lithology, pore types and structure and so on are studied. There are three main leading ideas:(1) the types of the lithology include volcanic breccia, tuff gritstone, glutenite, carbonate rocks, mixed rock and the calcareous sandstone. The main type of reservoir space is the secondary pore, the porosity is mainly distributed in the 5.1%～34.6%, the permeability is mainly distributed in the 0.15～340 mD;(2) the main control factors of the reservoir attributes is the sedimentation and the diagenesis;(3) three kinds of reservoirs are identified. Class Ⅰ is the "sweet spot" in the low permeability reservoir, oolite and organic clastics are the main components, dissolution pores are developed, the porosity is greater than 15%, and the permeability is grater than 6.5 mD. the understanding of the above achievements is of great significance to the efficient development of the oilfield.
For the reservoir fine evaluation, and reduce the oilfield development risks, on the problem of the characteristics of lithofacies diversity, complicated diagenesis, low porosity and permeability, based on the identification of cast slice, cathode luminescence, scanning electron microscopy, X-ray scattering techniques and mercury injection data, lithology, pore types and structure and so on are studied. There are three main leading ideas:(1) the types of the lithology include volcanic breccia, tuff gritstone, glutenite, carbonate rocks, mixed rock and the calcareous sandstone. The main type of reservoir space is the secondary pore, the porosity is mainly distributed in the 5.1%～34.6%, the permeability is mainly distributed in the 0.15～340 mD;(2) the main control factors of the reservoir attributes is the sedimentation and the diagenesis;(3) three kinds of reservoirs are identified. Class Ⅰ is the "sweet spot" in the low permeability reservoir, oolite and organic clastics are the main components, dissolution pores are developed, the porosity is greater than 15%, and the permeability is grater than 6.5 mD. the understanding of the above achievements is of great significance to the efficient development of the oilfield.
引文
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[19] 李鹏,屈红军,杨桂林,等.鄂尔多斯盆地南部长8致密储层微观特征及控制因素 [J].非常规油气,2018,5(3):39-45.
[20] 马浪,何斌,杜彦军,等.鄂尔多斯盆地王家湾地区长2油层组储层特征及分类评价 [J].非常规油气,2018,5(4):14-22.
[2] 张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-33.
[3] 沙庆安.混合沉积和混积岩的讨论[J] .古地理学报,2001,3(3):65-66.
[4] 郭福生,严兆彬,杜杨松.混合沉积、混积岩和混积层系的讨论[J].地学前缘,2003,10(3):62-67.
[5] 曲延明,舒萍,纪学雁,等.松辽盆地庆深气田火山岩储层的微观结构研究[J].吉林大学学报:地球科学版,2007,37(4):721-725.
[6] 庞彦明.酸性火山岩储层储集空间特征与评价研究—以松辽盆地北部营城组为例[D].杭州:浙江大学,2006.
[7] 张家政.准噶尔盆地红山嘴油田石炭系火山岩油藏储层研究 [D].长沙:中南大学,2009.
[8] 陈庆,张立新.准噶尔盆地西北缘石炭系火山岩岩性岩相特征与裂缝分布关系[J].现代地质,2009,23(2):305-312.
[9] 吴胜和.储层表征与建模[M].北京:石油工业出版社,2010,175-186.
[10] 冯增召.中国沉积学[M].北京:石油工业出版社,2013,76-84.
[11] 郭福生.浙江江山藕塘底组陆源碎屑与碳酸盐混合沉积特征及其构造意义[J].沉积学报,2004,22(1):136-141.
[12] 赵会民.辽河西部凹陷雷家地区古近系沙四段混合沉积特征研究[J].沉积学报,2012,30(2):283-290.
[13] 罗顺社,刘魁元,何幼斌.渤南洼陷沙四段陆源碎屑与碳酸盐混合沉积特征和模式[J].江汉石油学院学报,2004,26(4):19-21.
[14] 马艳萍,刘立.大港滩海区第三系湖相混积岩的成因与成岩作用特征[J].沉积学报,2003,21(4):607-613.
[15] 董桂玉,何幼斌,陈鸿德,等.惠民凹陷沙一中湖相碳酸盐与陆源碎屑混合沉积[J].沉积学报,2007,25(3):343-350.
[16] 董桂玉,陈洪德,何幼斌,等.陆源碎屑与碳酸盐混合沉积研究中的几点思考[J].地球科学进展,2007,22(9):931-939.
[17] 张娣,侯中健,王亚辉,等.板桥—北大港地区沙河街组沙一段湖相碳酸盐岩沉积特征[J].岩性油气藏,2008,20( 4):92-97.
[18] 董艳蕾,朱筱敏,滑双君,等.黄骅坳陷沙河街组一段下亚段混合沉积成因类型及演化模式[J].石油与天然气地质,2011,32(1):98-107.
[19] 李鹏,屈红军,杨桂林,等.鄂尔多斯盆地南部长8致密储层微观特征及控制因素 [J].非常规油气,2018,5(3):39-45.
[20] 马浪,何斌,杜彦军,等.鄂尔多斯盆地王家湾地区长2油层组储层特征及分类评价 [J].非常规油气,2018,5(4):14-22.