Evalution Of Reservoir Quality In Penglaizhen Zu, Xindu Gas Field

Reservoir description is a new technology used for oil or gas field exploration and exploitation which developed form the seventy's. The target of reservoir description is evaluating the reservoir by the method of describing the characters of the reservoir using seismic data, well logging data, core, well-testing data, recovery data, and so on.The point of exertion of this article is evaluating PengLaiZHen reservoir , xindu gas field using the new reservoir description techniques. The result is that this gas pool has simple structure, only forms a little nose-like structure at the district of FengHuangShan; this pool belongs to delta front sub-facies sedimentary model, the underwater distributary channel and mouth bar is the better sedimentary microfacies; The physical property of the reservoir is poor, the type of pore of the reservoir rock mostly are intergranular pore, intergranular solution hole and little are intercrystalline micropore; the influential factors of pore structure and physical property are lithofacies, lithologic character and diagenesis; The off-take potentia of all the testing well are deadly shortness, the wells have the worth of industrial recovery only under the condition of going through sand fracturing, and in the early of binging into production , the oil and sheath pressure drop rapidly, the production of the well drop rapidly . So although there are better oiliness in Peng II, Peng III, Peng IV gas pool and there are industrial off-take potentia after compressive fracture , this gas pool belongs to lower permeability, convention sand -density sand, little to middle throat - punctate pore, sealing elasticity gas drive, partly poor water drive, normal pressure, net gas, lithologic trap to nose-like structure - lithology compounding trap model. Because the anisotropism of the reservoir is severeness , there are no nature gapping , the reserves abundance is low and the well has no nature off-take potentia, this gas pool is a low permeability, low abundance , deadly low production, low grade complex pool.