Cross plotting of Rock Properties for Fluid and Lithology Discrimination using Well Data in a Niger Delta Oil Field

Journal of Applied Sciences and Environmental Management

ONIFADE, Y.S.¹  IGWENAGU, C. LINDA¹  BELLO, RASAQ¹ 

关键词: Hydrocarbon;    Reservoir;    Well –;    Logs;    Crossplotting;    Lithology;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

The cross plotting of rock properties for fluid and lithology discrimination wascarried out in a Niger Delta oil field using well data from a given oil field. The data used for theanalysis consist of suites of six wells. The reservoir was evaluated using gamma ray logs,volume of shale, resistivity and neutron porosity for well-02 and well-06. Sand lithologyshowed low gamma ray, high resistivity and low acoustic impedance. Cross plotting was carriedout and the plots with most outstanding results were Vp/Vs versus AI, λρ Versus Vp/Vs, μρagainst Density and λρ versus μρ. For the two wells considered, two reservoirs were observed,one reservoir was observed in well - 02 at a depth of 4600 ft to 5050 ft .and a reservoir was alsoobserved for well - 06 at a depth of 10240 ft to 10600 ft. Crossplotting of rock propertiesdiscriminated the wells into lithologies of sand and shale which is typical of Niger Delta. Thecrossplot also discriminated the fluids into gas, brine and oil. This study has been able todiscriminate hydrocarbon reservoirs using well logs in the field of study.

【 授权许可】

Unknown