Dense Well Spacing, High Watery Oil Field Reservoir Compression Fracture Transformation Engineering Research

The Jilin oil field is located south the pine distant basin, develops the oil field majority of by to infiltrate, the especially low seepage characteristic lowly primarily, has used the reserves low seepage, the especially low seepage accounts for above 60%.In recent years, thoroughly carried on along with the development, uses the irrigation supplement producing energy, the compression fracture production, the well pattern encryption and so on has become this kind of oil-field development the basic measure, at present the majority of oil fields entered the high watery phase of exploitation, the well pattern density further enlarge, the well spacing changes small, gives the reservoir compression fracture transformation to bring the new difficult problem for the main body increase production measure application.Artificial cracks that already exist for the reservoir, the first artificial stress field around cracks by the following superposition of several stress field by: far the venue of the production wells caused by stress and the stress field near cracks; long-term oil and gas wells lead to injection-production activities of the reservoir pore pressure changes caused by the stress field. Through the establishment of present-day distribution of the total stress field model, corresponding to the total field superposition to solve the stress field, calculated in different directions, location and the difference of stress distribution. Through the establishment of mathematical model, a clear decision on whether new cracks in the main factors: the level of differential stress, elastic modulus, crack length, crack width, the bottom-hole pressure/production pressure, permeability, and the remaining reservoir parameters affects only Stress time shift.The recent years field application practice indicated, establishes the research model is reasonable credibly, guidance, applies this research results, the redundant compression fracture well measure production increase quantity enhances above 10%, the watery reduces greatly, has the obvious change for the better take the well group as the unit development situation, has the strong theory and the practical application value.