Analysis of the Oil and GasBearing Turbidite Within Wenchang  Formation in Enping Depression, Pearl River Mouth Basin, China

Key words: 
• oil and gas /
• turbidite /
• Wenchang formation /
• Enping depression

Abstract: Exploration and development of lithologic oilgas reservoirs are important directions and hot research areas. Zhu1 Depression of Pearl River Mouth Basin has an annual crude oil output over 10 million tons,but the industrial value of the reservoir has not been found in subtectonic units:Enping Depression. In lower Tertiary Wenchang Formation in Enping Depression, there is a set of turbidite sand with 300 meters thickness and 140 km2 area and up and down it are halfdeep to deep lacustrine sedimentary facies fine sediments.Geological and geochemical study shows that the main hydrocarbon source rocks from Wenchang Formation developed well and there is the condition to form lithologic Oilgas reservoirs. Based on seismic data, combined geological and logging technology, hydrocarbon potential of turbidite has been comprehensively analyzed in Enping Depression from Lower Tertiary Wenchang Formation. Seismic information indicates that the turdibite has a low frequency energy boost up and high frequency energy depressed character; AVO anomaly in the same time, inphase axes descend in the below of the turdibite. Well EP1731 is the margin of the turdibite, an anomaly high pressure has been detected in the 45524642 meters depth. All the above shows oilgas bearing character. So, the turdibite is a favorable exploration object and of the hope for the exploration and development of oilgas reservoirs in Enping Depression.