轮南奥陶系潜山表层岩溶储层的分布特征

陈利新; 潘文庆; 梁彬; 罗日升; 张庆玉; 高翔

doi:10.3969/j.issn.1001-4810.2011.03.015

轮南奥陶系潜山表层岩溶储层的分布特征

doi: 10.3969/j.issn.1001-4810.2011.03.015

1.
中国石油塔里木油田勘探开发研究院
2.
中国地质科学院岩溶地质研究所

基金项目: 中国石油天然气股份有限公司塔里木油田分公司科技项目“轮古潜山轮古7井区以东奥陶系古岩溶特征研究”(编号041007090097)、“麦盖提斜坡岩溶体系与储层建模研究”项目编号(041010120140)、中国地质调查局“中上扬子及邻区重点盆地地质地球物理综合调查”工作项目(121201120967-07)

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出版历程
- 收稿日期: 2011-08-04
- 发布日期: 2011-09-25

The distribution characteristics of the epikarst reservoir in Lunnan Ordovician buried hill

1.
Research Institute of Petroleum Exploration & Development of Tarim Oilfield Company, Petro China
2.
Institute of karst Geology, CAGS

摘要

摘要: 轮南古潜山位于塔里木盆地塔北隆起轮南低凸起中部地区,主要岩溶层位是奥陶系鹰山组与一间房组,轮南古潜山的形成条件和表生岩溶作用时间与中国南方的桂林岩溶存在极其相似之处。本文通过研究轮南地区古风化壳表层岩溶带发育分布特征及其形成影响因素,认为:表层岩溶带主要分布于距古风化面以下0～40m范围内,此带范围内岩溶缝洞系统相对比较发育,岩溶缝洞系统具有一定连通性,属岩溶储层较为发育的部位,岩溶储层有效储集空间主要是溶蚀孔洞、小规模溶洞和溶蚀裂缝;表层岩溶带发育与古岩溶地貌及古水动力条件具有密切关系,岩溶地貌类型或水动力条件不同,表层岩溶带发育厚度、岩溶形态与岩溶缝洞系统发育规模、岩溶缝洞系统充填特征也不同。
- 潜山 /
- 奥陶系 /
- 表层岩溶带 /
- 古地貌 /
- 岩溶储层 /
- 塔里木盆地
Abstract: Lunnan ancient buried hill is located in the central region of Lunnan low bulge of Tabei uplift, Tarim basin. Ordovician Yingshan formation and Yijianfang formation are the major karst layers. The formation condition and the time of epigenic karstification of Lunnan ancient buried hill are very similar with Guilin karst in South China. With the study on the formation and distribution characteristics of epikarst in Lunnan ancient weathering crust and its influence factors, the following is gained in this paper. Epikarst belt, characterized by well developed karst fracture-cave system with certain connectivity, is range from 0 to 40m under the ancient weathering surface, which is the karst reservoir well developed part. The karst effective reservoir space is mainly corrosion pore, small-scale cave and corrosion fissure. The development of epikarst has close relationship with paleo-topography and paleo-hydrodynamic conditions. Under the different paleo-topography and paleo-hydrodynamic conditions, the thickness and karst shape of the epikarst, as well as scale and filling characteristics of karst fracture-cave system in the epikarst are different.
- burial hill /
- Ordovician /
- epikarst /
- paleo-topography /
- karst reservoir /
- Tarim Basin

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参考文献(9)

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