新疆石油地质

›› 2015, Vol. 36 ›› Issue (4): 1-1.doi: 10.7657/XJPG20150405

• 论文 •    

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

单 祥1，徐 洋1，唐 勇2，陈能贵1，郭华军1，韩守华1   

  1. (1.中国石油 杭州地质研究院,杭州 310023;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)
  • 出版日期:2019-01-01 发布日期:1905-07-14

Diagenesis and Effect on Physical Property of Lower Jurassic Badaowan Formation in Mobei-Mosuowan Area, Junggar Basin

SHAN Xiang1, XU Yang1, TANG Yong2, CHEN Nenggui1, GUO Huajun1, HAN Shouhua1   

  1. (1.PetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang310023, China;2.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang834000, China)
  • Online:2019-01-01 Published:1905-07-14

PDF

273

摘要： 综合利用铸体薄片、扫描电镜、X射线衍射、物性等资料，对准噶尔盆地莫北—莫索湾地区八道湾组储集层成岩作用进行了研究，指出八道湾组储集层存在压实（压溶）作用、胶结作用和溶蚀作用等成岩作用类型，目前成岩阶段处于中成岩阶段A期。储集层物性受成岩作用影响明显。八道湾组含煤系地层为酸性流体成岩环境，早期颗粒溶塌加上储集层塑性岩屑含量高，压实作用更强，孔隙度大幅下降，平均孔隙度减少28.75%，随后的高岭石胶结物、钙质胶结物及硅质胶结物进一步降低储集层孔隙度，平均孔隙度减少3.03%. 晚期长石颗粒溶蚀形成粒内溶孔改善储集层孔隙，平均孔隙度提高1.15%. 综合分析认为，八道湾组储集层中、粗砂岩刚性颗粒含量高、塑性岩屑含量低、抗压实能力强，是最有利的储集砂体。

Abstract: Based on comprehensive analysis of cast thin?section, SEM, X?ray diffraction, petrophysical property data, this paper presents the diagenesis types of compaction, cementation and dissolution existed in the Badaowan reservoir of Lower Jurassic, and points out that its diagenesis stage is now in period A of mid?diagenesis, and the reservoir quality is obviously influenced by the diagenesis. The coal measure strata of Badaowan formation belong to diagenetic environment of acidic fluid. The early dissolution of clastic particles and the high content of the reservoir plastic particles result in stronger diagenesis in it, by which its porosity drops dramatically by averaging28.75%, followed by continuously reducing due to existence of kaolinite, calcite and siliceous cements by3.03%in average. The late dissolution of feldspar grains forms intragranular dissolved pores which improve the reservoir porosity by averaging1.15%. Comprehensive analysis shows that midcoarse sandstone has high content of rigid grains, low content of plastic lithic fragments, and stronger compaction resistance, which is the most favorable reservoir sandbody

中图分类号: