Erlian Marginal Oilfield Development Research

The Marginal Oilfield is refers to under certain economical engineering factor uses conventional the method development, its economic efficiency is lower than the profession standard the oil field, but if passed through still might achieve or surpass its lowest economic indicator diligently. Changes constantly the situation which in the international oil price enlarges year by year with our country crude oil import, how studies develops the marginal oilfield to appear highly effective especially important. The Erlian marginal oilfield has the natural condition difference, the oilfield to disperse, the oil deposit scale to be small, the crude oil nature bad, the single well produces naturally can the low status characteristic, if uses conventional pumping unit production its economic efficiency extremely to be low. This article through to the Erlian oilfield 63 marginal well's research, proposed uses the negative pressure pump production development the Erlian marginal oilfield the method. The negative pressure pump is supplies the power using the pump truck unloading, drives the mine shaft pump tool through the steel wire to make the reciprocal motion in the well chamber, arrives at the well head the crude oil lifting, greases through the well head the pipeline to transport again the crude oil to pulls in the oil truck. This craft has the disposable investment few, the mobile nimble merits. A pump vehicle is one " the motion pumping unit and the gathering station ", suits in the Erlian marginal oilfield development. The pump produces the cost occurs with the pump system is closely related, therefore how to determine that the pump system becomes the direct relation production benefit quality the key aspect. This article the cost which produces through the analysis the Erlian oil- field 63 marginal well all previous years pump has the situation, had the process according to the cost to construct the simple practical cost to have the mathematical model, and proposed from this suits analog computation empirical formula which the Erlian marginal well pump production cost occurred, and carried on the fitting with the empirical formula to all previous years operating cost's occurrence situation, the fitting result has reflected the Erlian marginal well actual situation well. Based on this, has inferred the marginal well pump liquid level restoration theoretically and the most superior pump cycle definite method and has given the confirmation with the example, simultaneously also proposed from the theory and the example the pump depth's definite method and proposed the pump production critical watery, the critical output concept. Regarding surpassed the critical watery the oil well also to put forward the compound pump system's concept from another angle. The compound pump including a I level of system and many II level of systems, each II level of system has the different pump cycle and the pump depth. The part supercritical watery oil well through uses the compound pump system production, thus realized had the benefit production.