石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (3): 558-566.doi: 10.11743/ogg20180313

• 油气勘探 • 上一篇    下一篇

中-基性火山岩孔缝储集体形成控制因素——以准噶尔盆地金龙区块石炭系为例

孔垂显1,2, 陈轩1, 秦军2, 卢志远2, 高阳2, 申波1, 陈爱章1   

  1. 1. 长江大学 油气资源与勘探技术教育部重点实验室, 湖北 武汉 430100;
    2. 中国石油 新疆油田分公司 勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2017-06-26 修回日期:2018-01-20 出版日期:2018-06-28 发布日期:2018-06-21
  • 通讯作者: 陈轩(1983-),男,博士,副教授,沉积储层和油气田勘探。E-mail:chenxuanwolf@163.com。 E-mail:chenxuanwolf@163.com
  • 作者简介:孔垂显(1975-),男,高级工程师,油田开发。E-mail:kchuixian@petrochina.com.cn。
  • 基金资助:

    中石油重大科技专项(2017E-0405);中石油股份公司科技项目(kt2017-18-05);国家自然科学基金项目(41504103)。

Controlling factors for the formation of pore-fracture reservoirs in intermediate-basic volcanic rocks: A case study of the Carboniferous Jinlong Block,Junggar Basin

Kong Chuixian1,2, Chen Xuan1, Qin Jun2, Lu Zhiyuan2, Gao Yang2, Shen Bo1, Chen Aizhang1   

  1. 1. Key Laboratory of Oil and Gas Resources and Exploration Technology(Yangtze University), Ministry of Education, Wuhan, Hubei 430100, China;
    2. Exploration and Development Research Institute, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
  • Received:2017-06-26 Revised:2018-01-20 Online:2018-06-28 Published:2018-06-21

摘要:

以金龙区块石炭系中基性火山岩为例,综合岩心、薄片、测井、地震及分析化验资料,分析火山岩储集空间特征及形成过程:①火山喷发间隙期,火山旋回上部斜长石等矿物向方沸石、绿泥石蚀变,形成不稳定层;②石炭纪晚期构造运动造成断裂-裂缝发育及不整合面的形成,大气水沿着断裂-裂缝及旋回顶部不稳定层发生纵向及横向溶蚀,形成孔缝储集体雏形;③侏罗纪末期构造挤压再次形成断裂-裂缝,孔缝储集体被分割,储集空间基本定型。在断裂裂缝、古地貌及火山旋回界面控制下,孔缝储集体纵向上表现出分带性,横向上表现为古地貌高地储层厚、古斜坡储层薄的透镜状特征,整体表现出由裂缝、溶蚀孔及溶蚀缝构成的"多层楼式"复杂储集体。形成的孔缝型火山岩储层地质模型对火山岩储层预测及油气勘探提供有价值的参考。

关键词: 裂缝, 溶蚀孔, 火山旋回, 中-基性火山岩, 石炭系, 准噶尔盆地

Abstract:

This paper analyzed the characteristics of volcanic reservoir space and its formation process in the case of intermediate-basic volcanic rock in the Carboniferous Jinlong Block,by integrating the core,thin section,logging,seismic and analytical data.The results show that:(1)feldspar and other minerals in the upper volcanic cycle altered to zeolite and chlorite and formed an unstable layer during the volcano eruption quiescent intervals;(2)tectonic movement at the Late Carboniferous developed fault-fracture and unconformity,and then meteoric freshwater could cause vertical and transverse dissolution along the fault-fracture and the unstable layer at the top of the cycle;(3)new fault-fracture formed through the tectonic activity of the La te Jurassic period,and the pore-fracture reservoir was compartmentalized and the accumulation space was basically finalized.Under the control of fault-fracture,palaeo-geomorphology and contact surfaces of the volcanic cycles,the reservoirs are characterized by zonation in the vertical direction and by lenticular geometry with greater thickness in the paleo high and losser thickness down the paleo-slope.As a whole,the reservoir is a complex"multi-zone overlapping"reservoir,composed of fractures,dissolved pores,and dissolved fractures.The geological model of pore-fracture volcanic reservoir is of great value for volcanic reservoir prediction and oil/gas exploration.

Key words: fracture, dissolved pore, volcanic cycle, intermediate-basic volcanic rock, Carboniferous, Junggar Basin

中图分类号: