南方海相碳酸盐岩层系找气的思考  

THE MEDITATION OF GAS EXPLORATION IN MARINE CARBONATE FORMATION SERIES IN SOUTH CHINA

作　　者：戚厚发[1] 

机构地区：[1]石油勘探开发科学研究院,北京100083

出　　处：《勘探家（石油与天然气）》1998年第1期47-49,共3页

摘　　要：南方碳酸盐岩天然气勘探历经40年,至今未获得实质性突破,除地质条件复杂的客观因素外,勘探目标的评价思路也值得推敲。本文提出了区域盖层、古隆起、后期保存关键三要素的找气技术思路。区域盖层能把生成的天然气保存在地下,具有与气源同等的重要性;古隆起的早期富集作用,不仅为晚期成藏提供了丰富的气源,而且有效地保护了储集层的孔渗性;后期保存至关重要,需注意研究油气破坏的多期性。南方正处于由大区评价转向重点目标勘探阶段,在目标评价优选中,应突出关键三要素,选准目标,重点突破,可望获得好的勘探效果。Gas exploration of southern marine carbonate series has a history of forty years. But this exploration didn't obtain essential breakthrough so far. Author points out that in addition to the inherent complex geological conditions, the thinking of exploration objective evaluation is well worth a prudent deliberation. Author points out that regional cap rock, ancient uplift and later preservation are three elements to which had been paid much attention for searching gas. Regional cap rock can preserve the generated gas underground and is of same importance as gas source..The early enrichment of ancient uplift not only provides abundant gas source for the reservoir generation in late period, but also effectively protects the porosity and permeability of accumulation formation. The late preservation is an important link. Therefore, we need to pay more attention to multi-stage feature of oil and gas destruction. Southern exploration is undergoing a transition from an vast regional evaluation to essential objective exploration stage. Thus, it is required to emphasize three key elements, right selection of objective and breakthrough of key point during objective evaluation and optimization so that good exploration effectiveness will be hopefully obtained.

关 键 词：华南地区 碳酸盐岩 天然气井 天然气勘探 气相 

分 类 号：P618.130.8[天文地球—矿床学]