低孔低渗储层油水层识别技术

Oil-water Layer Identified Technology of Low-porosity and Low-permeability Reservoirs

随着石油勘探难度的加大,低孔、低渗油藏逐步成为石油勘探开发主要领域之一,它也是我国老油田增加石油地质储量及提高原油产量的主要领域。近年来,在苏北盆地高邮凹陷发现了多个低孔、低渗油藏,由于低孔、低渗储层孔隙度低、渗透率小的特点,受多种因素影响,多数油层电性不明显,油水层识别难度较大,常常存在遗漏现象。针对苏北盆地高邮凹陷低孔、低渗储层领域实际特点,结合试油测试、实验分析、生产动态资料,研究出评价低孔低渗储层的技术方法,在实际勘探开发生产运用中,尤其在油水层识别上,准确率较高,效果明显。

The low-porosity and low-permeability reservoir has gradually become one of the main areas of petroleum exploration and development because oil exploration has been the more and more difficult.They were the major areas of raising the geologic reserves and enhancing oil recovery in matured oilfields.In recent years,there has been a lot of low-porosity and low-permeability reservoirs found in Gaoyou Depression of Subei Basin,because they have the characters of low porosity and low permeability and influenced by various factors,it is difficult to recognize the reservoir for its unconspicuous resistivity between oil and water layer.In allusion to the exact characteristics of low porosity and low permeability reservoirs in Gaoyou Depression of Subei Basin,in combination with oil test experimental analysis and production performance data,technical method for evaluating low porosity and low permeability reservoirs is established and it is used in oil exploration and development,especially in oil-gas layer recognition,it obtains high precision and high efficiency.