The Logging Interpretation Of Tight Oil In Zhahaquan Area

Zahaquan oil field belongs to the tight oil reservoir under the condition of the special geological saline lacustrine basin sedimentary conditions,the unconventional reservoir areas.Its source rock has the Characteristics of early hydrocarbon-generation,long duration and high conversion rate.Different from other domestic dense reservoir high abundance ratios of organic matter,the organic carbon content is mainly distributed in 0.5 to 1.2% in Zahaquan area.Low organic carbon content and the influence of lithology Led to the logging response characteristics of the hydrocarbon source is not obvious.Reservoir lithology is complex,many for the transition of clastic rock and chemical lithology,strong heterogeneity,performance fine mix product characteristics,which causes the difficulty in effective reservoir identification..Mostly good physical properties of tight oil reservoir is oil layer while poor is dry at home and abroad.There are water layers in Zhahaquan area,some Wells after fracturing water production can reach dozens of cubic meters perday,the identification of oil and water is necessary.For the technical problems of hydrocarbon source rock evaluation,effectiveness evaluation,lithology identification,reservoir fluid identification,brittle evaluation etc.in Zhahaquan area density oil hydrocarbon source rock evaluation,the lithology identification,effectiveness evaluation,reservoir fluid identification,assessment of brittleness,and technical problems.Based on rock physics experimental analysis data,by means of conventional and imaging logging,by the the evaluation goal to source rocks quality,reservoir quality and completion quality,developed a set of suitable logging evaluation for the work area,improved the level of the comprehensive logging interpretation and the coincidence rate at Zhahaquan tight oil field.