摘要
原油体积系数是利用容积法计算原油储量的重要参数,对于提高油气田的开发效率、降低经济风险具有重要意义。为解决预测原油体积系数的高压物性取样分析方法存在的高成本、未设计高压物性取样,以及录井气测数据对比法预测精度不高等问题,提出一种结合区域地质资料与录井天然气碳同位素数据,使用耦合了模拟生烃动力学、同位素分馏和排烃过程的IsoBox软件推算气油比,继而通过原油体积系数与气油比相关关系求取地层原油体积系数的方法。利用涠洲X 6油田5口探井的天然气碳同位素录井数据对该方法进行了验证,结果显示计算的原油体积系数与高压物性分析结果相对偏差小于6.3%,表明该方法预测精度较高,具有较好的勘探应用前景。
Oil volume factor is an important parameter for calculating crudeoil reserves by volumetric method,which is of great significance for improving the development efficiency of oil and gas fields and reducing economic risks.In order to solve the problems of high cost,no design of high pressure physical property sampling and low prediction accuracy of gas logging data comparison method for predicting oil volume factor,a new method is put forward by combining the carbon isotope logging data of natural gas with regional geologic information.Using IsoBox software,which couples the simulation of hydrocarbon generation kinetics,isotope fractionation and hydrocarbon expulsion,the GOR is calculated,and then the formation oil volume factor is obtained through oil volume factor and GOR correlation.This method is verified by using the carbon isotope logging data of natural gas from 5 exploration wells in Weizhou X 6 Oilfield.The relative deviation between the oil volume factor calculated by this method and the result of high-pressure physical property analysis is less than 6.3%,which shows that this method has high prediction accuracy.It has a good explorationapplication prospect.
作者
杨宝伟
陆乐
向耀权
黄灿
高弘毅
张焕旭
YANG Baowei;LU Le;XIANG Yaoquan;HUANG Can;GAO Hongyi;ZHANG Huanxu(Zhanjiang Branch,CNOOC Ener Tech-Drilling&Production Co.,Zhanjiang,Guangdong 524057,China;Power Environmental Energy Research Institute,Los Angeles 917222,USA;CNOOC China Limited Zhanjiang Company,Zhanjiang,Guangdong 524057,China;Suzhou Grand Energy Technology Co.Ltd,Suzhou,Jiangsu 215129,China)
出处
《录井工程》
2025年第4期63-68,共6页
Mud Logging Engineering
基金
中国海洋石油有限公司“十四五”重大科技专项“地层岩性油气藏高效识别与精细评价技术”(编号:KJGG2022-0303)。
