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针对南美前陆盆地斜坡带圈闭规模小、数量多、资源国环保要求高等特点,提出一种以钻井平台控制圈闭为评价单元的斜坡带圈闭勘探评价新方法,并在奥连特盆地进行了现场应用。评价方法流程是:1圈闭地质风险分析,包括生、储、盖、圈、运、保等油气成藏关键要素分析,获得圈闭成藏概率;2风险评估后圈闭资源量计算,采用体积法计算圈闭资源量,圈闭资源量与圈闭成藏概率相乘得到风险评估后圈闭资源量;3钻井平台及钻探目标优选:以钻井平台控制范围为单元,统计不同平台控制范围内总圈闭风险评估后资源量、平均圈闭风险评估后资源量,根据数值大小对钻井平台进行优选排序;根据风险评估后圈闭资源量大小对优选出的钻井平台控制的圈闭进行钻探排序。运用该方法对奥连特盆地X区块M1层未钻圈闭进行优选排序,提出钻探平台建设和圈闭钻探顺序,实践表明效果良好。图6表4参33
In view of the small scale and large number of traps in the slope zone of the foreland basin in South America and the high requirements for environmental protection in resource-dependent countries, a new method for the exploration and evaluation of slope-zone traps based on the control trap of drilling platform is proposed. Field application. The evaluation method flow is as follows: 1. Analysis of traps, including the analysis of the key elements of the accumulation of oil and gas such as raw, reservoir, cover, circle, transport and insurance, and the probability of trapping accumulation; 2 Calculate the amount of trapping resources after risk assessment, Volume method to calculate trap resources, trap resources and trap accumulation probability multiplied risk assessment after trapping resources; 3 drilling platform and drilling target optimization: drilling platform control range as a unit, statistics of different platforms control range The amount of resources within the total trapping risk assessment and the average amount of traps after the trapping risk assessment, and the drilling platforms are preferentially sorted according to the numerical values; and the drilling traps controlled by the preferred drilling platform are drilled according to the amount of trapping resources after the risk assessment Sort. Using this method, the pre-drilling orders of the M1 layer in Block X of the Oriente Basin are optimized, and the construction of drilling platforms and the sequence of trapping drilling are put forward. Practice shows that the drilling results are good. Figure 6 Table 4 Reference 33