摘要
华庆油田长6油藏砂体分布范围广、油层厚度大。由于储层物性差、油水关系复杂,造成测井油水层解释符合率低,部分油井出现高阻产水,影响油田高效开发。通过沉积、成岩以及成藏等研究,认为储层孔隙结构、胶结程度、流体成分等微观特征差异是形成高阻水层的主要因素。在此基础上,以传统交会图版法为手段,提出了综合沉积、成岩、成藏因素的微元网格分析法,并将研究区划分为11个区域,量化了全区油水层物性下限。微元网格交会图版油水层识别方法现场应用效果良好,经试油、生产动态资料验证,综合解释符合率在86.9%以上,解释精度能满足油田开发需要。
Reservoir Chang6 in Huaqing Oilfield is characterized by wide distributed sandbodies and thick oil layers. Because of the poor reservoir physical properties and complicated oil-water relationship,the rather lower interpreted coincidence ratios are resulted for the logged oil and water layers,and moreover the high-resistance water is produced from the partial oil wells,thus the high-efficiency development of the oilfield is influenced. With the help of the following researches: sedimentation,diagenesis,hydrocarbon accumulation and so on,the main influencing factors of this kind of the water stated above are shown as follows: reservoir pore structures,cementation degree,fluid compositions and the other microscopic characteristic contrasts. Based on the above,the micro-grid method is developed with the traditional cross-plot chart-board method. In detail,for the method the factors of the sedimentation,diagenesis and hydrocarbon accumulation are integrated; and furthermore 11 blocks are divided in the research area and the lower limits are quantified for the oil and water layers in the whole area. Much better applied effects are achieved for the method,through the verifications of the oil test and production performance data,the combined coincidence rate is up to 86. 9% or above,the interpreted precisions can meet the requirements of theoilfield development.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2016年第6期144-147,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
中石油重大科技专项"长庆油田油气当量上产5000万吨关键技术研究"(2011E-13)
关键词
华庆油田
长6油藏
油水层识别
微元网格
Huaqing Oilfield
Reservoir Chang6
oil-water-layer identification
micro-grid method
