垦利10-1油田沙三上亚段沉积相的识别及沉积相特征
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摘要
垦利10-1油田沙三上亚段构造复杂、断层发育、储层横向变化快,使得对该亚段内沉积体系识不清楚。以明确沙三中亚段沉积相类型以及特征为目的,以沉积学和地质学理论为指导,通过对岩石颜色、岩性特征、沉积构造、地震响应特征的综合分析,认为垦利10-1油田沙三上亚段发育辫状河三角洲前缘亚相,在该亚相内利用测井相标志可进一步识别出水下分流河道、河口坝、席状砂以及水下分流河道间等4种微相;在沉积微相特征和地震属性的综合研究基础之上,剖析了沙三上亚段辫状河三角洲的时空演化规律,认为沙三上亚段辫状河三角洲由多期朵叶体相互叠置而成,平面上由北向南展布,从低位体系域、湖侵体系域到高位体系域的垂向演化序列来看,朵叶体的发育程度呈现由大变小再变大的特征,反应了进积、退积再进积(加积)的沉积样式。最后依据沉积相的时空演化特征,总结了沙三上亚段辫状河三角洲的沉积模式。研究成果可为油田下一步滚动勘探提供地质参考依据。
Because of complicated structure, existing faults, strong lateral reservoir heterogeneity, the understanding of sedimentary system of the upper Third Member of Shahejie Formation of KenLi 10-1 Oilfield is not clear. This paper aims at studying sedimentary facies types and characteristics. Taking Sedimentology and Geology theory as a guide and through comprehensive analyses of rock colors, lithologies, sedimentary structures and seismic responses, this paper concludes that the target zone develops braided-river delta front sedimentation which can be further classified into underwater distributary channel, mouth bar, sheet sand and tributary bay according to logging facies. Based on the comprehensive studies of sedimentary microfacies and seismic attributes, this paper looks into the space-time evolution of the braided-river delta of the upper Third Member of Shahejie Formation. The results show that the delta is composed by the superposition of North-South trending lobe bodies. And according to the vertical evolution sequence of lowstand, lake invasion and highstand system tract, the lobe development goes through a large-small-large changing process, indicating a progradation-retrogradation-progradation depositional pattern. Finally, according to space-time evolution characteristics, the sedimentary model of the braided-river delta of the upper Third Member of Shahejie Formation is concluded. The research results can provide geological reference for the next step of rolling exploration of the oilfield.
Because of complicated structure, existing faults, strong lateral reservoir heterogeneity, the understanding of sedimentary system of the upper Third Member of Shahejie Formation of KenLi 10-1 Oilfield is not clear. This paper aims at studying sedimentary facies types and characteristics. Taking Sedimentology and Geology theory as a guide and through comprehensive analyses of rock colors, lithologies, sedimentary structures and seismic responses, this paper concludes that the target zone develops braided-river delta front sedimentation which can be further classified into underwater distributary channel, mouth bar, sheet sand and tributary bay according to logging facies. Based on the comprehensive studies of sedimentary microfacies and seismic attributes, this paper looks into the space-time evolution of the braided-river delta of the upper Third Member of Shahejie Formation. The results show that the delta is composed by the superposition of North-South trending lobe bodies. And according to the vertical evolution sequence of lowstand, lake invasion and highstand system tract, the lobe development goes through a large-small-large changing process, indicating a progradation-retrogradation-progradation depositional pattern. Finally, according to space-time evolution characteristics, the sedimentary model of the braided-river delta of the upper Third Member of Shahejie Formation is concluded. The research results can provide geological reference for the next step of rolling exploration of the oilfield.
引文
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[12] 薛良清,Galloway W E.扇三角洲、辫状河三角洲与三角洲体系的分类[J],地质学报,1991;(2):141-153.
[13] 董福湘,赵冰仪,王志华,等.松南十屋断陷扇三角洲和辫状河三角洲沉积体系特征[J].长春工程学院学报:自然科学版,2009;10(2):49-52.
[14] 李维峰,高振中,彭德堂,等.库车坳陷中生界三种类型三角洲的比较研究[J].沉积学报,1999;17(3):430-434.
[15] 刘磊,钟怡江,陈洪德,等.中国东部箕状断陷湖盆扇三角洲与辫状河三角洲对比研究[J].沉积学报,2015;33(6):1170-1181.
[16] 尹楠鑫,李存贵,贾云超,等.东濮凹陷马寨油田卫95块扇三角洲沉积特征及沉积模式[J].东北石油大学学报,2015;39(6):20-29.
[17] 朱筱敏,邓秀芹,刘自亮,等.大型坳陷湖盆浅水辫状河三角洲沉积特征及模式—以鄂尔多斯盆地陇东地区延长组为例[J].地学前缘,2013;20(2):19-28.
[18] 谢俊,陈盼盼,李存磊,等.别古庄油田京58断块辫状河三角洲沉积特征[J].科技通报,2015;31(1):34-37.
[2] 钱利军,郝强,林良彪,等.川南地区上三叠统须家河组沉积特征与沉积演化模式[J].科学技术与工程,2016;3(16):28-34.
[3] 司学强,张金亮.广利油田沙四上亚段成藏地质特征与勘探方向[J].西安石油大学学报(自然科学版版),2008;23(1):6-10.
[4] 王勇,宋国奇,刘惠民,等.大庆长垣以东裕民地区扶余油层沉积相研究[J].科学技术与工程,2011;11(13):3039-3044.
[5] 李艳伟,陆正元,王姝,等.叶三拨油田黄骅坳陷孔店组孔二段沉积相研究[J].科学技术与工程,2013;13(26):7760-7780.
[6] 尹青,万朝大,刘伟君,等.地震相分析及其在石油勘探中的应用[J].地质找矿论丛,2011;26(1):79-84.
[7] 董艳蕾,朱筱敏,李德江,等.渤海湾盆地辽东湾地区古近系地震相研究[J],沉积学报,2007;25(4):554-563.
[8] 张杰,张振红,辛红刚,等.地震相分析技术在马岭油田储层预测中的应用[J],天然气地球科学,2012;23(3):590-595.
[9] 杨桥,漆家福,常德双,等.渤海湾盆地黄骅坳陷南部古近系孔店组沉积时期构造古地理演化 [J],古地理学报,2009;11(3):306-313.
[10] 方石,张培震,刘招君,等.东三江盆地南部白垩纪以来的沉积特征及其演化[J]吉林大学学报(地球科学版),2012;42(1):66-76.
[11] 张福顺.白音查干凹陷扇三角洲与辫状河三角洲沉积[J],地球学报,2005;26(6):553-556.
[12] 薛良清,Galloway W E.扇三角洲、辫状河三角洲与三角洲体系的分类[J],地质学报,1991;(2):141-153.
[13] 董福湘,赵冰仪,王志华,等.松南十屋断陷扇三角洲和辫状河三角洲沉积体系特征[J].长春工程学院学报:自然科学版,2009;10(2):49-52.
[14] 李维峰,高振中,彭德堂,等.库车坳陷中生界三种类型三角洲的比较研究[J].沉积学报,1999;17(3):430-434.
[15] 刘磊,钟怡江,陈洪德,等.中国东部箕状断陷湖盆扇三角洲与辫状河三角洲对比研究[J].沉积学报,2015;33(6):1170-1181.
[16] 尹楠鑫,李存贵,贾云超,等.东濮凹陷马寨油田卫95块扇三角洲沉积特征及沉积模式[J].东北石油大学学报,2015;39(6):20-29.
[17] 朱筱敏,邓秀芹,刘自亮,等.大型坳陷湖盆浅水辫状河三角洲沉积特征及模式—以鄂尔多斯盆地陇东地区延长组为例[J].地学前缘,2013;20(2):19-28.
[18] 谢俊,陈盼盼,李存磊,等.别古庄油田京58断块辫状河三角洲沉积特征[J].科技通报,2015;31(1):34-37.
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