| 摘要: |
| 依据辽河盆地东部凹陷40口代表性探井的物性测试、含油产状及试油结果等资料,综合运用经验系数法、最小含油喉道半径法、含油产状法和试油法确定研究区有效储层物性下限,并对适用于研究区火成岩的储层分类标准进行研究。结果表明:当孔隙度小于3％或者渗透率小于0.03×10-3 μm2时,通常不会形成工业或低产油气层,据此将这两个物性数值定为火成岩有效储层的孔隙度和渗透率下限; 根据孔隙度、渗透率、含油产状和试油结果等参数将火成岩储层标准划分为4类,分别为高孔高渗(I类)、较高孔较高渗(Ⅱ类)、中孔中渗(Ⅲ类)和低孔低渗(Ⅳ类);所确定的储层物性下限和分类指标能够客观反映火成岩储集层的特征,有利于研究区的油气勘探和资源评价。 |
| 关键词: 辽河盆地东部凹陷 新生界 火成岩储层 评价标准 物性下限 |
| DOI：10.3969/j.issn.1673-5005.2016.02.002 |
| 分类号::TE 122.2 |
| 文献标识码:A |
| 基金项目:国家重点基础研究发展计划“973”项目(2012CB822002);国家自然科学青年基金项目(41202085,8) |
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| Evaluation criterion and cut-off value of igneous rock reservoirs in Liaohe Basin |
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WANG Yanquan1, BIAN Weihua1, LIU Baohong2, GU Guozhong2, SUN Ang1, WANG Pujun1
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(1.College of Earth Sciences, Jilin University, Changchun 130061, China;2.Exploration and Development Research Institute, Liaohe Oilfield Company, PetroChina, Panjin 124010, China)
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| Abstract: |
| Based on previous results of the reservoir porosity-permeability, oil-bearing occurrence and oil testing of 40 representative wells in eastern depression Liaohe Basin, the cut-off value of the reservoir physical properties and reasonable evaluation criteria of study area were evaluated using a series of approaches, including empirical coefficient method, irreducible water saturation method, oil occurrence method and formation testing method. The results show that when the porosity is less than 3％, or the permeability is less than 0.03×10-3 μm2, the reservoir usually is dry and does not contain any oil or gas. Therefore 3％ porosity and 0.03×10-3 μm2 permeability are chosen as the cut-off values for effective reservoirs of the igneous rocks. Based on porosity, permeability, oil-bearing occurrence and oil testing results, the igneous rock reservoirs can be characterized into four classes:(I) high porosity and high permeability, (Ⅱ) high-medium porosity and permeability, (Ⅲ) medium porosity and permeability and (IV) low porosity and permeability. The evaluation criteria and the cut-off values objectively describe the characteristics of igneous rock reservoir and can be applied preferably in decision-making for oil and gas exploration. |
| Key words: eastern depression of Liaohe Basin Cenozoic igneous rock reservoirs evaluation criterion cut-off value |
