中低勘探程度区块油气条件地质风险评价

GEOLOGIC RISK EVALUATION OF OIL AND GAS IN THE BLOCKS WITH LOW-MEDIUM EXPLORATION DEGREE

根据成藏特征与勘探实际，建立了针对中低勘探区块的5项评价条件21项参数的评价体系与评分标准。为了充分反映各项评价条件研究程度以及在评价时所起的不同作用，在确定各项评价参数权重的基础上，采用“评价因素加权求和”的方法计算5项条件评价值，利用“5项条件评价值加权求和”的方法求取区块地质风险评价值。该方法在松南地区的应用表明，16个区块中勘探潜力大的Ⅰ类区块有4个，具有一定勘探潜力的Ⅱ类区块有7个，勘探潜力有限的Ⅲ类区块有5个。为该区下一步的油气勘探部署提供了依据。

According to hydrocarbon accumulation characteristics and exploration practice, an evaluation system and criteria including 5 evaluation conditions and 21 parameters is established aiming at the blocks with low-medium exploration degree. In order to fully reflect research degree and roles of diversified evaluation conditions, and based on weight of evaluation parameters, 5 condition evaluation values are calculated by weight sum of evaluation factors, with which geological risk evaluation value is obtained. Application of this method in southern Songliao Basin proves that there are 4 Class Ⅰ blocks with great exploration potential, 7 Class Ⅱ blocks with good exploration potential, and 5 Class Ⅲ blocks with little potential, which offers evidence for next step petroleum exploration deployments.