Shengtuo Oilfield Development Of Post-formation Sand Production Prediction Technology Research

Sand production is the sand carried by the fluid in oil wells in oil recovery. And it is one of the hard problems to dispose in oil production. And it exists in the middle or later period production of the old oil fields in our country. Sand production prediction is important because of the safety, environmental, and operational concerns involved when produced sand particles fill and plug the well bore, erode down-hole and surface equipment, and increase operating expense.Owing to lack research in sand mechanism, it is sightless in production practice, though all production plants devoted many manpower and material resources in sand control, growing up a system of sets of sand prevention technology, and making great progress in the field. So it is very necessary to enhance research sanding due to rock destroyed around shot hole.Aiming at sand produce in the weak cementation reservoir in Shengtuo Oil Field easily, the data of five core holes in three tracts is analyzed, and 19 samples is taken. The three-axis tension tests is made by simulating the reservoir condition, and gained the important data. And at last found the relationship of rock intension and well depth, interval transit time by analyzing the data of the core holes and the rock intension test.In the meantime, sanding mechanism of perforation completion is analyzed considering the wall rock stress field around wellbore effect on the stability of the perforation hole, and a sand prediction theoretic model is established, and analyzed the reliability of the model at the same time. Gained the critical production pressure difference and the critical output by the model. And the calculation results will help to make recovery project in the high water cut period, and will be in favor of enhancing economic benefit.