中国南方海相地层油气保存条件综合评价技术体系探讨

中国南方海相地层的油气藏分别在加里东、印支和燕山期经历了多期多阶段的演变过程,被构造活动改造的强度大。油气保存条件破坏严重,且缺乏有效的评价方法。本文试图通过研究地下流体的化学-动力学行为规律,从动态和演化的角度分析剥蚀作用、断裂-破碎作用、大气水下渗作用等对油气藏破坏的程度、方式,综合评价油气的成藏、保存条件,探索针对南方海相地层油气保存条件评价的技术体系。

An Exploration on a Technological System of Petroleum Preservation Evaluation for Marine Strata in South China

Oil-gas reservoirs of marine strata in South China had undergone several evolution processes in the Caledonian, Indosinian and Yanshanian respectively, which induced oil-gas reservoirs to be reconstructed greatly by tectonic activity. The preservation conditions are destroyed badly and effective technique is absent in evaluating hydrocarbon preservation. Through studying chemical and dynamical rules of underground fluids, the damage degree and mode of reservoirs by denudation, fault-fracture and permeating downwards of meteoric water are analyzed from the dynamic and evolution view. Subsequently we try to appraise the formation and preservation of oil and gas and probe into a technological system of hydrocarbon preservation aiming at marine strata in South China.