THE GEOLOGICAL CHARACTERS OF THE TIGHT OIL/GAS RESERVOIRS IN DAANZHAI SECTON NORTHERN SICHUAN AND THE EXPLORATION TECHNIQUE FOR IT
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摘要: 介屑灰岩是川北地区大安寨段主要储集岩,它的基质孔隙度、渗透率低;孔隙结构差,次生溶蚀孔洞、缝则是油气赋存与富集的主要空间。介屑油气藏是主要类型,具明显的非层状、非均质体特征。介屑相带是控制油气富集带的基础。Abstract: Coquina is the main reservoir rocks in Daanzhai Section of northern Sichuan,but its porosity, permeability and pore geometry are quite poor. The secondary dissolution pores, caves and fractures constitute most of the space for the storage and accumulation of oil/gas. The main type of the facies of oil/gas pools is shelly bank with nonstratified and inhomogeneous characters. The shelly bank facies controls the enriched oil/gas zones. The local structures and fractures formed in the later stage of the tectonic movement did not rework much the shelly bank oil/gas pools and did not significantly redistributed the previously formed oil and gas pools. Therefore,the exploration of commecial oil/gas pools in the section of northern Sichuan should be focused on the main body of the shelly bank located in the interior zone of shallow water lacustrine facies surrounding the sub deep-deep water la-custrine facies of the oil-generative depression.
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[1] 罗蛰潭、王允诚、邓询康川东中石炭统碳酸盐岩储集岩的孔隙结构研究——《石油与天然气地质》,第3期,1983. [2] 曲志浩储集岩最小含油喉道半径之确定及其在油藏评价中的应用——《油田开发论文集》,第1集,1982. [3] 曲志浩最小含油喉道半径在油藏评价中的应用——《石油学报》,第3期,1983. [4] 王当奇对川北地区大安寨段沉积环境及找油意义的认识——《石油实验地质》,第3期,1983.
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