查干凹陷碎屑岩储集层特征及有利区带预测  

RESERVOIR CHARACTERISTIC AND ADVANTAGED ZONES PREDICTATION OF CHAGAN DEPRESSION

作　　者：王惠民[1] 靳涛[2] 高志前[1] 杨红霞[2] 

机构地区：[1]中国地质大学(北京),北京100083 [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　　处：《新疆石油天然气》2005年第1期43-47,共5页Xinjiang Oil & Gas

摘　　要：查干凹陷位于银根盆地东部,勘探主要目的层为下白垩统。在对该凹陷白垩系碎屑岩储集层的沉积和演化、岩石学类型、储集层空间及储集性能、成岩作用和孔隙演化等研究表明,储集层岩石学特征表现为近物源、快堆积、岩性多变的特点;孔隙类型具有次生孔隙多、微孔隙多、碳酸盐胶结物发育的孔隙多等特征;大多数为特低孔特低渗储集层,但达中孔中渗的储集层也有分布;碳酸盐胶结物的选择性溶蚀、火山岩作为隔挡层对下伏碎屑岩压实作用的减缓能够形成次生溶蚀孔隙较为发育的储集层。在此基础上,对潜在的成藏有利区带进行了预测,指出下白垩统苏红图组在海力素背斜带、巴润断鼻带东部和罕塔庙次凹三个构造带找油更现实,而银根组储集层在海力素构造带上可作为主力储集层对待。Chagan depression is in the east of Yin' gen basin, and lower cretaceous is major exploration stratum. Through studies on sedimentation and evolution, lithology types, reservoir hole and ability, diagenesis and hole evolution of the clastic reservoirs in Crataceous, the characteristics in lithology types are of close substance fountain, rapid accumulation and changeful lithology;most pore types are induced openings, micro-openings and solution cavity of carbonate cementation; most of reservoirs is of rather low porosity and rather low permeability, and there are also the reservoirs of moderate porosity and moderate permeability. Choiced dissolubility of carbonate cementation and reduced effect of volcanic rocks can form the reservoir of induced development of solution cavity. On the basis of these, potential oil and gas accumulation zones are predicted - Hailisu anticline zone, eastern Barun zone and Hantamiao secondary - depression in Suhongtu group and Hailisu tectonic zone in Yin' gen group are favorable areas.

关 键 词：银根盆地 查干凹陷 碎屑岩 储集层 沉积特征 成岩作用 有利区带 

分 类 号：TE122.2[石油与天然气工程—油气勘探]