Impact Analysis of the Hyrersalinity Saline Mud' Invasion to Electric Logging

We obtain actual survey electronic resistivity and the ratio's mean value of every gas bearing formation passage and water bearing formation passage by counting,and obtain the relations of matter parameter,gas saturation,shale content and each investigation depth electronic resistivity of over 50 wells.We use the capillary pressure law to definite gas saturation,then use the saturation and unify the Archie equation to push the electronic resistivity.Compare the electronic resistivity pushed and the depth sounding electronic resistivity actually measured,and analyze the influence of the invasion of high degree of mineralization to electronic resistivity.The analysis indicated that,the array induce,the double induction,two-sided and so on the electricity logging series above 80% display invading lowly,and under 20% display for no invading in gas bearing formation passage.If contrast ratio is not high,the electronic resistivity of water bearing formation did not affected by the invasion of high degree of mineralization.