摘要
为解决浊积水道形成的储层平面非均质性影响剩余油分布问题,通过对测井资料和地震资料的解释,特别是利用地震资料对O71层解释标定,分别形成了单井沉积相、剖面地震沉积相和平面沉积相。在平面沉积相控制的储层水道砂体展布基础上,结合四维地震监测显示的注水前缘变化,同时考虑注采对应关系和构造顶点分布,刻画出O76,O74,O73及O71这4个主要含油目的层剩余油分布范围和模式,研究了剩余油分布主控因素和挖潜措施,并利用数模成果进行了检验。研究结果表明1)原始地质储量及剩余油分布受浊积水道控制;2)研究区剩余油分布模式包括注采不对应造成的“水道滞留型剩余油”,隔夹层和构造共同控制的“隔夹层型剩余油”及构造高点和储层非均质性控制的“阁楼型剩余油”3种模式,其中第1种模式以O76层和O74层剩余油分布为代表,第2种模式以O73层剩余油分布为代表,第3种模式以O71层剩余油分布为代表;3)对于储层非均质性较强,剩余油较多的Ⅱ类、Ⅲ类型模式,剩余油挖潜措施可以考虑空气泡沫驱和气水交替,对于相对均质的Ⅰ类剩余油模式,措施包括生产井转注和生产井(注水井)侧钻。该研究成果为深水油气田提高采收率提供了借鉴。
To solve the problem of remaining oil distribution affected by reservoir plane heterogeneity of the turbidite channel,through the interpretation of logging data and seismic data,especially the interpretation of o71 layer by seismic data,single well sedimentary facies,profile seismic sedimentary facies and plane sedimentary facies are studied respectively.Based on the distribution of reservoir channel sand body controlled by plane sedimentary facies,combined with the change of water injection front shown by four-dimensional seismic monitoring,and considering the corresponding relationship between injection and production and the distribution of structural vertex,the remaining oil distribution range and pattern of O76,O74,O73 and O71 are given,and the main controlling factors and remaining oil development are studied.The numerical simulation are used to test.The results show that:1)The distribution of original geological reserves and remaining oil is controlled by turbidite channel;2)The remaining oil distribution pattern in the study area includes three patterns:“channel remaining oil”caused by injection production mismatch,“interlayer remaining oil”controlled by interlayer and structure,and“attic remaining oil”controlled by structural vertex and reservoir heterogeneity.The first pattern is represented by the remaining oil distribution in layers O76 and O74,the second pattern is represented by the distribution of remaining oil in O73 layer,the third pattern is represented by the distribution of remaining oil in O71 layer;3)For the typeⅡandⅢpatterns with strong reservoir heterogeneity and much oil,the remaining oil potential tapping measures can consider air foam flooding and gas water alternation.For the relatively homogeneous typeⅠremaining oil mode,measures include production well transfer and production well(water injection well)sidetracking.The research results provide reference for enhanced oil recovery in deepwater oil and gas fields.
作者
张新春
陆文明
李林地
张洪
石军太
宋兆杰
ZHANG Xinchun;LU Wenming;LI Lindi;ZHANG Hong;SHI Juntai;SONG Zhaojie(Dingbian Oil Production Plant of Yanchang Oilfield,Shaanxi Yan’an 716000,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China;Petroleum Engineering College,China University of Petroleum,Beijing 102249,China;Unconventional Resource Institute,China University of Petroleum,Beijing102249,China)
出处
《非常规油气》
2021年第4期26-35,共10页
Unconventional Oil & Gas
基金
国家重大专项“安哥拉深水浊积岩油藏高效开发技术”(2016ZX05033-003-005)。
关键词
A油田
深水浊积岩
沉积相
剩余油
主控因素
A oilfield
deep water turbidite
sedimentary facies
remaining oil
main controlling factors
