缝洞型储层声波远探测测井响应模拟及应用——以塔河油田碳酸盐岩缝洞型储层为例  

Simulation and Application of Acoustic Remote Detection Logging Response in Fracture-Cavity Reservoirs:Taking Fracture-Cavity Carbonate Reservoirs in Tahe Oilfield as an Example

作　　者：蔺学旻 肖红琳 Lin Xuemin;Xiao Honglin(Research Institute of Exploration and Development,Sinopec Northwest Oilfield Company,Urumqi 830011,China)

机构地区：[1]中石化西北油田分公司勘探开发研究院,乌鲁木齐830011

出　　处：《吉林大学学报(地球科学版)》2025年第1期312-327,共16页Journal of Jilin University:Earth Science Edition

基　　金：中国石化科技攻关项目(P20039)。

摘　　要：塔河油田奥陶系碳酸盐岩缝洞型储层缝洞类型多样、结构复杂。声波远探测技术能够探测到井外数十米范围内的地质异常体,在这种缝洞型油藏评价中具有广阔的应用前景。本文首先采用完全匹配层(perfectly matched layer,PML)吸收边界条件的交错网格有限差分方法模拟塔河油田缝洞型储层的声波远探测测井响应;然后根据缝洞空间分布建立过井及井旁裂缝不同长度、开度、角度的裂缝分布模型以及井旁洞穴、孔洞尺寸、数量、远近变化的缝洞型储层模型;再用有限差分方法模拟波场,分析裂缝、洞穴、溶蚀孔洞的波场特征,用偏移成像处理方法得到远探测声波波场裂缝、洞穴、溶蚀孔洞的成像结果,建立相应的声波远探测成像解释模型;最后将实钻井声波远探测测井资料与常规测井、电成像测井和地震剖面特征及试油成果进行对比。结果表明,应用此方法建立的声波远探测解释模型对碳酸盐岩缝洞型储层的判识效果良好,适用于塔河油田碳酸盐岩缝洞型储层的识别与评价。Fracture-cavity reservoirs of Ordovician carbonate rock in Tahe oilfield have various types and complex structures.Acoustic remote detection technology can detect geological anomalies in the range of tens of meters outside the well,and has broad application prospects in the evaluation of fracture-cavity reservoirs.Firstly,the staggered grid finite difference method with perfectly matched layer(PML)absorption boundary conditions is used to simulate the acoustic remote detection logging response of fracture-cavity reservoirs in Tahe oilfield.Then,through the simplified modeling of fracture-cavity spatial distribution,the fracture distribution model with different lengths,openings and angles of fractures passing through and beside the well and the fracture-cavity reservoir model with the changes of cave,hole size,number and distance beside the well are established.Then the wave field is simulated by finite difference,the wave field characteristics of cracks,caves and dissolution holes are analyzed,and the imaging results of cracks,caves and dissolution holes of acoustic remote detection wave field are obtained by offset imaging processing method,and the corresponding imaging interpretation model of acoustic remote detection is established.At last,the acoustic remote detection logging data of real drilling are compared with conventional logging,electric imaging logging,seismic profile characteristics,and oil test results.The results show that the acoustic remote detection interpretation model established by this method is effective for the identification and evaluation of carbonate fracture-cavity reservoirs.

关 键 词：塔河油田 缝洞型储层 声波远探测 数值模拟 解释模型 实例应用 

分 类 号：P631.8[天文地球—地质矿产勘探]