The Research Of Technology And Information Evaluation Of Short-term Production Test Well

The Daqing oilfield has been exploited since 1960s,and it has already forty years history. The area extend continually from Daqing to some periphery oilfields, such as Longhupao,Yushulin and Hailaer. The physical properties of the oil layer alter from high permeability to low permeability. Accompany more and more deeply development of the exploratory development, the difficultly become stronger, and movable storage decrease continuously. In order to take from the venture of investment, and improve the precision of storage handed in, and constitute nice project of exploratory development, the Daqing oilfield unfolded short-term production test in 2002. The short-term test means the production test time is 1 to 3 months.Before the 2002s, the production test needed half a year time, in order to hand in the ascertained reserves of certain block. Choose some wells in this block, then process production test in 183 days (half a year). Because of the blocks of Daqing oilfield is all of low permeability reservoir, and stratum can't satisfy oil servicing continuously, so combining to the fact of the oilfield, the fashion of production test adopt single rate and intermission fashion. It means that startup the well and pump oil at the same time everyday. When the certain output has been reached, shut in the well and resume it. The next day we repeat the same operation like the former day's, and the spear time repeat that again and again until the time of 183 days is over. Then use a long time to shut in the well and resume it, until the reservoir pressure is steady. Usually, based on the flow pressure of the bottom of the well and stratum physical properties, the time is about 3 to 6 months.The purpose of short-term production test is that: Affirm the logical deliverability of the reservoir and the fluid property; Ravel the dynamic parameter of the reservoir, and confirm pressure swept area and the relevant reservoir limit; Use material balance method to account single well controlled reserves; Provide exact proof to delicate evaluation and constitute development plan of deliverability; Take from the venture of investment, and expedite the speed of the exploratory development. So the production test fashion is required to almost simulate the producing fashion of exploitation well in any block. It is mostly represent in the following aspects: (1) For the blocks of low yield and high cost of per ton oil, when we bail out the oil with casing, it is required to sample the information of the bottom hole flowing pressure;(2) For the wells of multiple zone which merely test intermediate or underlying layers, they are required to like exploitation wells, which submergence depth are hundreds meter, namely carry out exposed pumping; (3) For high saturation pressure well, adopt back pressure test fashion to test.This paper is written based on the purpose and require of short-term production test. Contraposing the...