The research of reservoir characteristics indicate that the T_1j~2_2 reservoir's pore spaces were dominated by intercrystalline pores and corrosion pores, there have 1 ~2 high porosity section by corrasion in Mainan structure, the porosity is 6~16%,and in this area reservoirs mainly belong to type Ⅱ and typeⅢ, the reservoir type was defined as fracture-pore type. and the reservoir physical property were primarily dominated by sedimentary fades、 corrosion and dolomization.
The reservoir space was mainly secondary with many reservoir space type and complicated structure. The reservoir space type was fall into 3 types and 7 kinds. The reservoir type is mainly divided into big fracture and cavern and fracture —solutional void with porosity of 5% -0.1%.
The researches of sedimentary facies and reservoir characteristics indicate that the Xujiahe layer-4 reservoir pore spaces was dominated by residual primal intergrain and ingrain infrasonic corrosion pores ,the reservoir type was defined as fracture- porosity reservoir, reservoir type mainly belongs to type Ⅲ or type Ⅱ -Ⅲ .
With its wide-range distribution, small scale, high initial output and rapid decrease,together with its complexity in reservoir type and reservoir-formation conditions,there is no systematical research methodology, which affected its exploration anddevelopment.
A three layer BP neural network is designed and used to train the samples. Then, the reservoir types are categorized when the model parameters are obtained. The obtained result agrees well with that of imaging logging and core analysis.
It shows that a large potential for oil resource exploration still exists in Qaidam Basin. The Qaidam Basin can be divided into two types of petroliferous systems based on the Jurassic source rock and Tertiary source rock due to the diversity in the source rock and reservoir types, difference in reservoir's characteristics.
Through analyzing reservoir characteristics,specially underground fracture permeability and the factors of controlling favorable reservoirs,it is determined that the type of reservoir is mainly fracture-pore type. The underground fracture permeabilities calculated are 0.015×10 -3 ～0.093×10 -3 μm 2,however,their contribution to effective permeabilities is 70～80% and only a cutoff matrix permeability of 0.0272×10 -3 μm 2 is necessary for commercial reservoir.
(2) Based on the type of reservoir pore pace and flow path, existed research achievements, aimed at all kinds of complex carbonate reservoir in Sichuan basin, two main types of reservoir is reasonably divided into the fracture-pore reservoir(carboniferous period and J23) and fracture-cave reservoir (Yang Xin reservoir) and geologic feature of each type of reservoir is summed up.
No distinct communities were evident for the different reservoir types, suggesting that each type contains a series of rotifer assemblages, with gradual changes in species composition occurring in response to changes in environmental conditions.
These optimised models yield unbiased estimates over a large range of reservoir types.
For comparisons with the other reservoir types, a gas content value of 42.9 scf/ton is used to calculate CO2 storage capacity herein.
From published studies, it has become apparent a different set of parameters controls production for each different reservoir types.
It did not prove possible to estimate significantly different values for other reservoir types.
The prediction, exploration, and development of this type of reservoir require theoretical research on seismic wave fields reflected from complex inhomogeneous media.
There is no statistically significant difference in the results between any patient diagnosis, source of narrow tube or type of reservoir.
A practical suggestion to help alert these physicians to the possibility of a ruptured urinary reconstruction is that such patients should carry a medical card stating the type of reservoir they have along with their special circumstances.
Histological inflammation could not be correlated with the type of reservoir, residual volume after evacuation of a known volume of stool substitute introduced per anum into the reservoir or compliance of the reservoir.
The reservoirs transform the chemical composition of the water in various ways, depending on the quality of the inflowing water and the type of reservoir.