| 作 者：姚雪根 |
| 单 位：中国石油浙江油田公司 |
| 基金项目： |
| 摘 要： |
| 天然气藏勘探的成功或失利,取决于气藏圈闭的封堵系统和散失系统。介绍了四川盆地气藏圈闭封堵系统和散失系统的类型、分布范围和对气藏圈闭的保存和破坏作用。气藏圈闭封堵系统的优劣取决于圈闭的有效封堵面与区域盖层的有效整体封闭条件和区域水动力停滞带环境条件,封堵系统良好的圈闭,勘探成功率高。气藏圈闭散失系统由缺乏区域盖层有效整体封闭条件的剥蚀区、区域水动力自由交替带环境、 通天断层或潜伏通天断层组成。散失系统导致圈闭失效,从而造成勘探失利。通过对四川盆地天然气藏的破坏与保存条件的多个实例剖析,提出在四川盆地及我国南方海相天然气勘探中应当重视对天然气藏破坏与保存条件的研究,以利于天然气藏勘探区块、目标的选择和勘探效率的提高。 |
| 关键词：四川盆地；油气勘探；气藏封堵系统；气藏散失系统；油气藏保存条件 |
| Author's Name: Yao Xuegen |
| Institution: Zhejiang Oilfield Company, PetroChina |
| Abstract: |
| Either success or failure of natural gas exploration depends on enclosed system or escaped system of the gas reservoir trap. Whether the enclosed system of a trap is good or poor lies on available enclosed surface of the trap and the effective sealing condition of the whole overlying regional cap rock with the circumstance condition of regional hydrodynamic stagnation zone. Available traps with good enclosed surfaces mean high rate of successful exploration. An escaped system of a gas reservoir trap includes denuded area without effective sealing condition of regional cap rock, the circumstance condition of regional hydrodynamic free alternation zone, and obvious and/or hidden faults extending to the surface. An escaped system will lead to an invalid gas trap, which means failure of exploration. By case analysis of wreck and preservation conditions of gas reservoirs in Sichuan Basin, it is suggested that an attention should be paid to the studies of wreck and preservation conditions of gas reservoirs in natural gas exploration in Sichuan Basin and southern China to achieve exactly choice aims of exploration and rise explo- ration efficiency. |
| Keywords: Natural gas exploration; Enclosed system of gas reservoir; Escaped system of gas reservoir; Preservation conditions of gas reservoir; Sichuan Basin |
| 投稿时间： 2005-05-31 |
