胡尖山油田C2层储层特征及有利区预测  

Reservoir characteristics and favorable area prediction of layer C2,Hujianshan Oilfield

作　　者：郭远智 康玉柱[2] 程飞飞 杨博[1] 王珍[1] GUO Yuanzhi;KANG Yuzhu;CHENG Feifei;YANG Bo;WANG Zhen(No.6 Oil Production Plant of Changqing Oilfield Company,PetroChina,Xi′an 710200,China;Research Institute of Petroleum Exploration&Development,SINOPEC,Beijing 100083,China)

机构地区：[1]中国石油长庆油田分公司第六采油厂,陕西西安710200 [2]中国石化石油勘探开发研究院,北京100083

出　　处：《断块油气田》2025年第1期47-54,共8页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金青年科学基金项目“基于机器学习的致密页岩油藏CO_(2)压采一体化方法研究”(52204070)。

摘　　要：鄂尔多斯盆地胡尖山油田中部浅层C2层非均质性强,物性及油水关系复杂,有利区预测难度大。文中综合利用铸体薄片鉴定、物性测试、测井解释等技术,深化研究储层特征,以及小层沉积微相与砂体展布特征,明确油藏富集规律和油藏主控因素,建立了有利区评价原则与标准,优选出目标区块建产有利区。结果表明:1)C2层岩性以细—中细砂岩为主,储集空间以粒间孔隙为主,排驱压力低,储集性好;2)C2层发育河控型三角洲平原亚相沉积,水下分流河道砂体发育程度较高,各小层构造平缓,局部发育鼻状隆起带,且具有较好的继承性;3)基于流体测井识别图版和储层电性解释标准,明确了C2层有效厚度划分标准,即渗透率、孔隙度下限标准分别为0.5×10^(-3)μm^(2)和12%,针对C2_(1)小层筛选出一个Ⅱ类有利区,预测石油地质储量为142.8×10^(4) t。研究成果对胡尖山油田持续稳产具有重要意义。The reservoir of shallow layer C2 in central Hujianshan Oilfield in Ordos Basin has strong heterogeneity and complex physical properties and oil-water relationships,making it difficult to predict favorable areas.This article integrates various techniques such as casting thin section observation,physical property testing and logging interpretation to deepen the study of reservoir characteristics,the sedimentary microfacies and sand body distribution characteristics of small layers,clarify the enrichment rules and main controlling factors of the reservoir,establish evaluation principles and standards for favorable areas,and select target blocks to build production favorable areas.The results show that:(1)The lithology of layer C2 reservoir is mainly fine sandstone to medium-fine sandstone,with intergranular pores as the main reservoir space,having low displacement pressure and good storage performance.(2)Layer C2 reservoir develops river-controlled delta plain subfacies,and the development degree of distributary channel sand bodies is relatively high.Structures of each small layer are gentle,with local development of nose-shaped uplift zones,which have relatively good inheritance.(3)Based on the fluid logging identification chart and reservoir electrical interpretation standards,the lower limits of permeability and porosity for the effective thickness division standard of layer C2 reservoir are 0.5×10^(-3)μm^(2)and 12%,respectively.A type II favorable area is selected for the sub-layer C2_(1),with a predicted geological oil reserve of 1.428 million tons.The research results are of great significance for the sustained and stable production of Hujianshan Oilfield.

关 键 词：储层特征 沉积微相 测井响应特征 有利区预测 鄂尔多斯盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]