CHARACTERISTICS OF INSULATING LAYERS AND EVALUATIONOF SEALING ABILITY FROM XINGLONGTAI OIL HORIZON OF LIAOHE OILFIELD

Kui Heming; Dang Ben; Dun Tiejun

doi:10.11743/ogg20010121

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CHARACTERISTICS OF INSULATING LAYERS AND EVALUATIONOF SEALING ABILITY FROM XINGLONGTAI OIL HORIZON OF LIAOHE OILFIELD
Vol. 22, Issue 1, Pages: 88-92(2001)
Online First：25 March 2001，

Published：2001
DOI： 10.11743/ogg20010121
稿件说明：

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DOI：

Kui Heming, Dang Ben, Dun Tiejun. CHARACTERISTICS OF INSULATING LAYERS AND EVALUATIONOF SEALING ABILITY FROM XINGLONGTAI OIL HORIZON OF LIAOHE OILFIELD[J]. 2001, 22(1): 88-92. DOI： 10.11743/ogg20010121.

摘要

辽河油田曙光区兴隆台稠油油层中隔层按岩性可分为泥岩类、砂(粉砂)质泥岩类、泥质砂(粉砂、砾)岩类.不同类型隔层的特征明显不同

渗透率以泥质砂(砾)岩类最高

其次为砂质粉砂质泥岩类

泥岩类最低;突破压力以泥岩类最高

泥质砂(粉砂、砾)岩类最低

砂(粉砂)质泥岩类介于中间;热导率、比热容和热膨胀系数以泥岩类最高

次为砂(粉砂)质泥岩类

泥质砂(粉砂、砾)岩类最低.根据隔层的突破压力、中值半径、小孔隙含量、渗透率和厚度等将本区油层隔层分为3类、6个亚类

其中泥岩类为Ⅰ类(封闭型)隔层

对蒸汽的阻隔能力最强

砂(粉砂)质泥岩为Ⅱ类(限制-封闭型)隔层

阻隔能力介于Ⅰ类与Ⅲ类之间

泥质砂(粉砂、砾)岩类为Ⅲ类(限制型)隔层

阻隔蒸汽能力最低.根据Ⅰ类和Ⅱ类隔层分布系数、<1m厚隔层分布系数及隔层分布连续性

综合评价认为

兴隆台稠油层7套隔层中有4套为好隔层

1套为较好隔层

2套为差隔层.

Abstract

The insulating layers of Xinglongtai dense oil horizon in Shuguang District

Liaohe Oilfields could be divided into three types such as mudstone

sandy mudstone

argillaceous sandstone.Their properties differ differently with each other.The argillaceous sandstone possesses the highest permeability then the sandy mudstone;mudstone has the lowest permeability but possesses the highest breakpressure;the argillaceous sandstone has the lowest breakpressure. As for thermal conductivity

specific heat and thermal expansion coefficient

mudstone is the highest and argillaceous sandstone is the lowest.According to the breakpressure

midvalue radius

permeability and thickness

the insulating layers could be divided into three types and six subtypes. Among all the seven layers in the study area

four of them are fine

two of them are secondary

two of them are poor.