圈闭资源量计算参数确定方法——以断块型圈闭为例

油气勘探早期阶段,受地质认识和资料控制程度等限制,尤其受地质人员主观认识上的偏差影响,造成资源量计算参数取值过大,长期过高估计圈闭资源量,直接影响勘探部署决策。为使圈闭资源量计算结果更符合客观实际,该文在分析圈闭资源量各参数主要影响因素的基础上,应用中心极限定理、概率分布函数构建等相关原理,对圈闭资源量每个参数按不同情况组合并相乘,得到相应多个不同的资源量参数值,并由最小二乘法在对数坐标上拟合确定一条直线,在经过合理性检验之后,最终确定资源量计算参数值。

Parameter definition in resource calculation of a trap:A fault block example

In the early period of petroleum exploration, high value parameters were usually applied in resource calculation due to the limitation of data or knowledge. As a result, trapped resources were overestimated, which impacted exploration strategy. The key factors influencing the main parameters for resource calculation were analyzed in this paper to make estimation more realistic. Central limit theorem, probability distribution function and some other related theories were applied. Parameters were combined and multiplied under different situations to obtain multiple sets of parameters. A straight line regression of the least squares derived on a log-log plot finally determined rational parameters for calculating resources.