论文部分内容阅读
在以往研究工作的基础上 ,结合近期所获地质资料的分析和天然气运聚成藏规律的研究 ,对莺歌海盆地泥底辟带中深层 (T30 以下 )天然气勘探中的 CO2 风险进行了分析 ,认为中深层 CO2 风险相对较小 ,中深层 CO2 分布与浅层 CO2 分布类似 ;CO2 等非烃气的局部富集主要与泥底辟及热流体上侵活动密切相关 ;在中深层寻找高产富烃天然气 ,必须选择构造规模大、储集条件好、相对低压低势且距泥底辟活动中心区较远的构造布井 ,以避免可能出现的 CO2 风险
Based on the previous research work and combined with the recent analysis of the geological data obtained and the study on the law of gas migration, accumulation and accumulation, the CO2 risk in the middle-deep (below T30) gas exploration in the mud belt of the Yinggehai Basin was analyzed , The risk of mid-deep CO2 is relatively small, and the distribution of mid-deep CO2 is similar to that of shallow CO2. The local enrichment of non-hydrocarbon gases such as CO2 is closely related to the invasion of mud diapirs and thermal fluids. Hydrocarbon natural gas, we must choose to construct a large scale, good reservoir conditions, the relative low-pressure low and from the mud diapiric activity center far away from the construction wells to avoid possible CO2 risk