塔河油田AT9井区三叠系阿四段滩坝砂储层预测

Beach-bar sand reservoir prediction for the 4th member of Triassic Akekule Formation in Tahe Oilfield

(中国石油化工股份有限公司西北油田分公司勘探开发研究院,新疆乌鲁木齐830011)

Exploration & Production Institute,Northwest Branch Company,SINOPEC,Urumqi 830011,China

塔河油田南部阿克亚苏地区三叠系阿克库勒组四段(阿四段)滨浅湖相滩坝砂储层厚度小、横向变化快,单个滩坝砂体识别的难度较大。以阿四段滩坝砂储层预则为目标，建立了一套以叠后地震资料提频处理技术、地震古地貌和属性分析技术、拟声波测井约束波阻抗反演技术和神经网络油气检测技术等为主的技术系列。利用这些技术对AT9井区三叠系阿四段滨浅湖相滩坝砂储层进行了有利区域预测,部署并钻探的滚动开发井中有两口井在阿四段滩坝砂储层中获得了工业油气流，取得了较好的应用效果。

Shore-shallow lake facies beach-bar sand reservoir at the 4th member of Triassic Akekule Formation in Tahe Oilfield has the characteristics of small thickness,fast lateral changes,and difficult in recognizing single beach-bar sandbody.Aiming at the reservoir prediction for the 4th member of Triassic Akekule Formation,we established a series of technologies,including frequency increasement processing of poststack seismic data,seismic palaeogeomorphology and attributes analysis,pseudo-acoustic log constraint wave impedance inversion and neural network hydrocarbon detection and so on.The technologies were applied to predict favorable targets for the 4th member of Triassic Akekule Formation in AT9 well area.In terms of the prediction result,four wells were deployed and drilled.Among the four wells,well AT9-2 and well AT9-3 both obtained commercial oil and gas flow in the 4th member of Triassic Akekule Formation.