基于多图版识别可靠性分析的复杂流体性质识别方法  

Recognition method of complex fluid properties based onmulti-plate recognition reliability analysis

作　　者：高楚桥[1] 杜坤 王波[2] 赵彬[1] GAO Chuqiao;DU Kun;WANG Bo;ZHAO Bin(School of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,Hubei;Information Management Center,Zhongyuan Oilfield,SINOPEC,Puyang 457001,Henan)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100 [2]中国石化中原油田信息化管理中心,河南濮阳457001

出　　处：《长江大学学报（自然科学版）》2023年第3期47-54,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项“东海深层低渗致密天然气勘探开发技术”(2016ZX05027-002-002)。

摘　　要：珠江口盆地储层流体性质十分复杂,既有油层、气层,还有凝析气层,且存在大量低对比度储层,利用单一图版难以准确识别储层流体性质,其识别结果存在多解性。为解决上述问题,在优选出流体性质区分效果好的图版的基础上,引入图版中储层样本点到分界线的距离这一参数,计算可以反映图版识别可靠性的流体识别概率;然后再将储层在单一图版的流体识别概率引入到多图版综合识别概率计算中,建立基于多图版识别可靠性的复杂流体性质识别方法,即多图版综合识别方法。该方法可充分利用优选的测井和气测录井信息,同时降低可靠性较低的图版对最终识别结果的影响,避免结果出现多解性时无法准确识别储层流体性质的情况。利用多图版综合识别方法对珠江口盆地22个测试层位进行储层流体性质识别,储层流体识别符合率达到90.9%,高于单一图版储层流体识别符合率,可有效提高珠江口盆地储层复杂流体性质的识别精度。The fluid properties of the reservoirs in the Pearl River Mouth Basin are very complex,including oil reservoirs,gas reservoirs,condensate gas reservoirs and a large number of low-contrast reservoirs.Therefore,it is difficult to accurately identify the reservoir fluid properties with a single plate,and the recognition results are divergent.In order to solve the above problems,on the basis of optimizing the plate with good fluid property discrimination effect,the parameter of the distance from the reservoir sample point to the boundary line in the plate was introduced to calculate the fluid identification probability that can reflect the plate identification reliability.Then,the fluid identification probability of the reservoirs on a single plate was introduced into the calculation of the multi-plate comprehensive identification probability,and a complex fluid property identification method based on the reliability analysis of the multi-plate identification was established,namely the multi-plate comprehensive identification method.This method can make full use of the preferred logging and gas logging information,and at the same time reduce the influence of the less reliable chart on the final identification results,so as to avoid the situation that the reservoir flow properties cannot be accurately identified in the case of multiple solutions.Using the multi-plate comprehensive identification method to identify reservoir fluid properties of 22 test layers in the Pearl River Mouth Basin,the coincidence rate of reservoir fluid identification reaches 90.9%,which is higher than that of single-plate reservoir fluid identification,and can effectively improve the recognition accuracy of complex fluid properties of reservoirs in the Pearl River Mouth Basin.

关 键 词：气测录井 流体识别概率 多图版综合识别 珠江口盆地 

分 类 号：P631.84[天文地球—地质矿产勘探] TE132.14[天文地球—地质学]