天然气地球科学

• 天然气地质学 • 上一篇    下一篇

川西坳陷斜坡带蓬莱镇组三段沉积特征与储层分布——以什邡地区JP32砂组为例

胡向阳,李宏涛,史云清,肖开华,郭艳东,李浩,高君   

  1. 页岩油气富集机理与有效开发国家重点实验室,中国石化海相油气藏开发重点实验室,中国石化石油勘探开发研究院,北京 100083
  • 收稿日期:2018-01-17 修回日期:2018-03-06 出版日期:2018-04-10 发布日期:2018-04-10
  • 通讯作者: 李宏涛(1977-),男,黑龙江巴彦人,高级工程师,博士,主要从事储层沉积与描述等研究. E-mail:dhlht523@sina.com
  • 作者简介:胡向阳(1964-),男,吉林松原人,教授级高级工程师,博士,主要从事储层描述与评价等研究.E-mail:huxy.syky@sinopec.com.
  • 基金资助:

    国家科技重大专项“川西凹陷斜坡带复杂致密砂岩气藏开发关键技术”(编号:2016ZX05048-004)资助.

Sedimentary characteristics and reservoirs distribution from Penglaizhen Formation 3rd member in slope belt of Western Sichuan Depression:A case study of JP32 sandstone group from Shifang area

Hu Xiang-yang,Li Hong-tao,Shi Yun-qing,Xiao Kai-hua,Guo Yan-dong,Li Hao,Gao Jun   

  1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective,Development Key Laboratory for Marine Oil and Gas Exploitation,Exploration and Production Research Institute,SINOPEC,Beijing 100083,China
  • Received:2018-01-17 Revised:2018-03-06 Online:2018-04-10 Published:2018-04-10

摘要:

川西什邡地区蓬莱镇组三段(简称“蓬三段”)气田具有良好的开发潜力。综合利用岩心观察、薄片、物性、压汞等资料,结合测井解释、储层及含气性预测,对该区蓬三段的层序沉积特征及主要目的层3砂组(JP32)的储层特征、分布预测与评价进行了研究,分析了有效储层发育的控制因素。结果显示,蓬三段可划分为5个砂组,各砂组厚度稳定,反映了平坦湖盆沉积的特征;根据岩相标志、相序分析浅水湖盆平缓毯式河控三角洲前缘水下分流河道是砂体发育的最有利沉积微相。JP32砂组储层主要为低孔—低渗—特低渗(或近致密)孔隙型细粒岩屑砂岩。平面上JP32砂组砂体展布受河道边界控制,河道砂体范围内有效储层分布相对局限,特别是一类、二类优质有效储层发育区, 主要位于研究区北部和中部河道内,呈不连续条带状分布。综合分析认为,优质有效储层发育主要受有利沉积微相分布的控制,在一定程度上,也受到构造相对高部位、断裂和裂缝分布控制。

关键词: 川西蓬莱镇组三段, 什邡地区, 层序沉积, 储层分布, 控制因素

Abstract:

The Penglaizhen Formation 3rd  member (Peng 3 member for short) gas field has good development potential in the Upper Jurassic in Shifang area in western Sichuan Basin.Based on detailed observation from well cores,ordinary and mold thin section,porosity,permeability,mercury experiment analysis results of some samples,combined with reservoir log interpretation and seismic prediction,well seismic integration,sequence,sedimentary facies,reservoir characteristics,reservoir distribution prediction and comprehensive evaluation of Peng 2 gas-pool and main object strata 3 sandstone groups ( JP32 ) are researched in this area from Western Sichuan Depression area,and the controlling factors of effective reservoir development are analyzed.The research results show that Peng 3 member can be divided into five sand groups.The internal sandstone groups strata thickness is relatively stable,which shows that the strata were deposited in sedimentary environment of stable structure,flat lacustrine basin.Combined with the characteristics of litho-facies marks,facies sequence character analysis,logging response and seismic facies,the shallow-water river-controlling gentle blanket delta front underwater distributary channel is the most favorable sedimentary micro-facies.In  JP32 sandstone groups,the pore type of fine debris sandstone reservoir rocks mainly has the characteristics of low porosity,low to extra-low (or near tight) permeability.The plane distribution of sand bodies in  JP3 sand group is controlled by river boundary.Compared with distributary channel sand bodies,the distribution range of effective reservoirs,especially,the high-quality effective reservoirs of  JP3 sandstone groups are relatively limited with the discontinuous band characteristics,and are mainly located in the northern and middle channel.Comprehensive analysis shows that the key of the development of high-quality and effective reservoirs is controlled by lithologic distribution of favorable sedimentary micro-facies,and to a certain extent controlled by relatively high tectonic sites,fractures and fractures.

Key words: Western Sichuan Penglaizhen Formation 3rd  member, Shifang area, Sedimentary sequence, Reservoir distribution, Controlling factors

中图分类号: 

  • TE122.1

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