油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (3): 1-6.

• 油气地质 • 上一篇    下一篇

冷东地区下干柴沟组上段沉积储层特征研究

陈波1,2,郝媛媛1,石海信1,孙国强2,史基安2,吴志雄3   

  1. 1. 钦州学院广西高校北部湾石油天然气资源有效利用重点实验室,广西 钦州 535000
    2. 甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,甘肃 兰州 730000
    3. 中国石油青海油田分公司勘探开发研究院,甘肃 敦煌 736202
  • 收稿日期:2017-04-10 发布日期:2018-12-07 出版日期:2018-06-26
  • 作者简介:陈波(1985—),男,博士,油气储层地质学及油气藏开发。
  • 基金资助:
    广西中青年教师基础能力提升项目“北部湾涠西南凹陷储层构型特征对油田含水率的影响研究”(2017KY0787);钦州学院校级重点培育项目及高层次人才引进启动项目“文昌油田储层构型及其剩余油分布特征研究”(2016PY-SJ10,2017KYQD113)

Sedimentary facies and reservoir characteristics of upper reservoir of lower Gangchaigou formation in eastern Lenghu region

Chen Bo1,2,Hao Yuanyuan1,Shi Haixing1,Sun Guoqiang2,Shi Ji'an2,Wu Zhixiong3   

  1. 1. Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, Qinzhou University, Qinzhou, Guangxi 535011, China
    2. Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
    3. Exploration and Production Research Institute of Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China
  • Received:2017-04-10 Online:2018-12-07 Published:2018-06-26

摘要:

综合运用重矿物、岩心、测录井及物性资料,对冷东地区浅层下干柴沟组上段沉积储层特征进行了研究。结果表明该区沉积期离物源距离较近,发育辫状河三角洲平原沉积,砂岩类型以长石岩屑砂岩和岩屑长石砂岩为主,成分和结构成熟度较低。储层孔隙类型主要为残余原生粒间孔,碎屑的粒径大小与孔渗高低呈正相关性。根据储层分类标准,将研究区储层从优至劣分为三类,大部分为Ⅱ类和Ⅲ类储层,孔隙度和渗透率较低,属于中低孔—低渗储层,且非均质性较强。研究区储层物性与沉积时的水动力强度有关,优质储层主要分布于辫状河三角洲平原分流河道较厚的砂体中。

关键词: 下干柴沟组上段, 沉积储层, 物性特征, 储层评价

Abstract:

Based on the data of the heavy mineral, core, logging and physical, we studied the sedimentary microfacie reservoirs' characteristics of the upper reservoir of the lower Gangchaigou formation in eastern Lenghu region. The results show that during the deposition period, the area is close to the source, and the developed raided river delta plain, sandstone type is mainly composed of feldspar lithic sandstone and lithic feldspar sandstone, and its composition and structure maturity are low. The main pore types of the reservoir are the residual intergranular pores, and the grain size is positively correlated with the porosity and permeability. According to the reservoir classification standard, the reservoir area is divided into three types, most of which not only belong to reservoir Ⅱ and Ⅲ with low porosity and permeability, but also belong to medium and low porosity-low permeability reservoirs with strong heterogeneity. The physical properties of reservoirs in the study area are related to the hydrodynamic forces at the time of the sedimentation. The high quality reservoirs are mainly distributed in thick sand bodies with braided river delta distributions.

Key words: upper reservoin of the lower Gangchaigou formation, sedimentary facies and reservoir characteristic, physical characteristics, reservoir evaluation

中图分类号: 

  • TE122.2