靖边油田新城区长2油层组沉积微相与储层特征研究
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摘要
鄂尔多斯盆地靖边油田新城区延长组长2油层组沉积微相与储层特征为油气田的开发设计提供科学的依据。在测井、扫描电镜和压汞测试等资料综合分析基础之上,对鄂尔多斯盆地靖边油田新城区长2油层组进行了沉积相、储层特征研究,分析了沉积微相、岩石学特征、孔隙特征、物性特征及沉积环境和成岩作用对储层发育的影响。研究表明:长2储层主要为辫状河沉积,主要发育河口砂坝和泛滥平原微相;孔隙类型有残余粒间孔、溶蚀孔、微裂隙等,以粒间孔为主,溶孔次之;平均孔隙度11.6%,平均渗透率9.95×10~(-3)μm~2,为低孔低渗储层;沉积环境是储层发育的基本控制因素,压实作用、胶结作用和溶蚀作用都是影响储层发育的主要影响因素。
The sedimentary microfacies and reservoir characteristics of Chang 2 oil formation in Yanchang Formation of new Jingbian oilfield in Ordos Basin provide scientific basis for the development and design of oil and gas fields.In this paper,the sedimentary microfacies and petrological characteristics of the Chang 2 reservoir in the Xincheng,Ordos Basin,Jingbian oilfield,are studied by logging data analysis,SEM and Hg test data.The effects of sedimentary microfacies,rock diagenesis,cementation and dissolution on the physical properties and reservoir characteristics of the rocks are analyzed.The study shows that the chang 2 reservoir is mainly the braided river deposit,which mainly develops the estuarine sand dam and the flood plain microfacies,and the pore types include residual intergranular pores,dissolution pores and microfissures,such as the intergranular pores,and the dissolution pores,and the sedimentary environment is the basic control factor for the development of the reservoir,and the compaction,cementation and dissolution are all the main factors of reservoir development.
The sedimentary microfacies and reservoir characteristics of Chang 2 oil formation in Yanchang Formation of new Jingbian oilfield in Ordos Basin provide scientific basis for the development and design of oil and gas fields.In this paper,the sedimentary microfacies and petrological characteristics of the Chang 2 reservoir in the Xincheng,Ordos Basin,Jingbian oilfield,are studied by logging data analysis,SEM and Hg test data.The effects of sedimentary microfacies,rock diagenesis,cementation and dissolution on the physical properties and reservoir characteristics of the rocks are analyzed.The study shows that the chang 2 reservoir is mainly the braided river deposit,which mainly develops the estuarine sand dam and the flood plain microfacies,and the pore types include residual intergranular pores,dissolution pores and microfissures,such as the intergranular pores,and the dissolution pores,and the sedimentary environment is the basic control factor for the development of the reservoir,and the compaction,cementation and dissolution are all the main factors of reservoir development.
引文
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[11]窦伟坦,田景春,王峰,等.鄂尔多斯盆地长6油层组储集砂岩成岩作用及其对储层性质的影响[J].成都理工大学学报(自然科学版),2009,36(2):154~158.
[12]钟大康,朱筱敏,周新源,等.次生孔隙形成期次与溶蚀机理-以塔中地区志留系沥青砂岩为例[J].天然气工业,2006,26(9):21~25.
[13]王道富,付金华,雷启鸿,等.鄂尔多斯盆地低渗透油气田勘探开发技术与展望[J].岩性油气藏,2007,19(3):126~130.
[14]李道品.低渗透油田开发概论[J].1997,16(3):33~37.
[2]杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2002.
[3]党,赵虹,康晓燕,等.鄂尔多斯盆地陕北斜坡中部延长组深部层系特低渗储层敏感性微观机理[J].中南大学学报,2012,44(3):1100~1107.
[4]刘金水,曹冰,徐志星,等.西湖凹陷某构造花港组沉积相及致密砂岩储层特征[J].成都理工大学学报,2012,39(2):130~136.
[5]Fisher W L,McGowen J H,Brown L F Jr,et al.Environmental Geologic Atlas of the Texas Goastal Zone:Galveston-Houston area[R].Austin:The University of Texas,1972:1~91.
[6]朱筱敏.沉积岩石学[M].北京:石油工业出版社,2008.
[7]王正和,郭彤楼,谭钦银,等.四川盆地东北部长兴组-飞仙关组各沉积相带储层特征[J].石油与天然气地质,2011,32(1):56~63.
[8]殷建国,刘旭,白雨,等.准葛尔盆地阜东斜坡区沉积相特征及其对储层的控制作用[J].天然气地球科学,2015,26(2):23~32.
[9]王峰,田景春,陈蓉,等.鄂尔多斯盆地北部上古生界盒8储层特征及控制因素分析[J].沉积学报,2009,27(2):238~245.
[10]单祥,徐洋,唐勇,等.莫北—莫索湾地区八道湾组储集层成岩作用及其对储集层物性的影响[J].新疆石油地质,2015,36(4):402~408.
[11]窦伟坦,田景春,王峰,等.鄂尔多斯盆地长6油层组储集砂岩成岩作用及其对储层性质的影响[J].成都理工大学学报(自然科学版),2009,36(2):154~158.
[12]钟大康,朱筱敏,周新源,等.次生孔隙形成期次与溶蚀机理-以塔中地区志留系沥青砂岩为例[J].天然气工业,2006,26(9):21~25.
[13]王道富,付金华,雷启鸿,等.鄂尔多斯盆地低渗透油气田勘探开发技术与展望[J].岩性油气藏,2007,19(3):126~130.
[14]李道品.低渗透油田开发概论[J].1997,16(3):33~37.