预测断层封堵性的FSPS软件系统

The fault-sealing prediction software system-FSPS

预测断层的封堵性对于降低油气勘探风险非常重要。由于断层平面不同部位和同一部位的不同深度封堵性都不同 ,因此需要采用计算机技术来快速计算断层上每一点与封堵性有关的参数。断层封堵预测系统FSPS采用岩性并置法、泥质涂抹系数法定量分析评价断层封堵性 ,并定性分析岩石碎裂和胶结成岩作用对断层封堵性的影响 ,可以确定断块的油气溢出点 ,圈定可能的圈闭范围 ,得到圈闭幅度、圈闭面积等要素 ,从原始数据输入、评价参数计算到结果输出方便快捷。给出在我国东部某小断块区应用FSPS系统预测 7个目标砂岩层断层封堵性的实例 ,对其中两个小断块预测的断层最大封堵油气的高度与用毛细管压力数据预测的结果相当 ,表明用FSPS系统预测的结果是可靠的 ,具有推广应用价值。

It is very important to predict the sealing capability of a fault in reduc ing t he risks of hydrocarbon exploration. The parameters of estimating sealing capabi lity from each point on the fault surface need to be calculated rapidly by using computer methods, because the fault sealing varies over the fault surface along strike of the fault and on depth points of layers at same part of the fault sur face. The fault sealing prediction system, FSPS, has been developed to assess th e fault sealing or nonsealing by quantitative analysis of lithology juxtapositio n and the shale smear factor, and by qualitative analysis of cataclasis and diag enesis. FSPS can estimate a hydrocarbon spill point on a fault block and calcula te likely the range of a trap and essential elements of the trap (e.g., trap hei ght, trap area, etc), it is convenient and rapid to input source data, calculate parameters, and display results. An example of applying FSPS to predict fault s ealing of 7 sand layers on small fault blocks area in the east of China is given . The maximum hydrocarbon heights estimated on two small fault blocks of the are a is equal to the result estimated by capillary pressures, and this effect shows that the results provided by FSPS are reasonable and FSPS is abroad worthy to a pplication.