地质科技情报2018，Vol.37Issue(1)：135-142,8.DOI:10.19509/j.cnki.dzkq.2018.0118
致密砂岩储层差异性成岩演化对孔隙度定量演化表征影响:以鄂尔多斯盆地马岭地区长81储层为例
Quantitative Calculation of Tight Sandstone Reservoir Porosity Evolution Based on Different Diagenesis:A Case Study from Chang 81 Reservoir of Maling Area,Ordos Basin
摘要
Abstract
The Chang 81 reservoir in Maling area of Ordos Basin has developed into low-ultra low porosity and extra low-ultra low permeability tight sandstone reservoir under the combined influences of sedimentation and burial diagenesis.Most of its diagenetic stage belongs to the middle-late period of Phase A of the middle diagenetic stage.The rest of it belongs to the early period of Phase B in the middle diagenetic stage.Based on diagenetic evolution characteristics and comprehensive geological effect,this papaper establishes simulation equations of porosity evolution for Chang 81 reservoir in Maling area,and analyses the independence and relevance between different types of diagenesis.According to the analysis of the four typical samples,the paper suggests that the samples are mainly affected by compaction.The simulation results of porosity evolution show these samples of Chang 81's tight sandstone reservoir in Maling area of Ordos Basin the porosity lost by compaction is 23.47％ on average.As a result of the agglutinate content and fluid property,the porosity lost by agglutination in the early period is 3.21％ lower than in the middle-late period.The porosity lost by agglutination in the middle-late period is 7.79％.The porosity rising from corrosion is 5.53 ％.The differences of diagenetic evolution processes are the major cause for different sandstone pore structures,sandstone reservoir performance and physical characteristics.关键词
马岭地区/致密砂岩/差异性成岩/孔隙度/定量演化Key words
Maling area/tight sandstone/differences of diagenesis/porosity/quantitative evolution分类
天文与地球科学引用本文复制引用
黎盼,孙卫,高永利,张茜,杜堃,白云云..致密砂岩储层差异性成岩演化对孔隙度定量演化表征影响:以鄂尔多斯盆地马岭地区长81储层为例[J].地质科技情报,2018,37(1):135-142,8.基金项目
国家科技重大专项“大型油气田及煤层气开发”(2011ZX05044) （2011ZX05044）
国家青年科学基金项目(41702146) （41702146）
陕西省青年人才基金项目(2016JQ4022) （2016JQ4022）
