王场油田井溢、井漏典型案例及预防应对措施

On Typical Overflow and Leakage in Wangchang Oilfield and Countermeasures

王场油田是江汉油区钻井施工中井溢、井漏的常发区块,造成该区块发生井溢、井漏的主要原因有盐间裂缝,盐间注水,局部高压油层、水层,地层亏空,低压地层,断层等。合理确定井位、科学设计井身结构、针对可能发生的井溢、井漏,制订完备的应急预案及针对井溢、井漏风险较大的重点区块制订的专项应对措施,可保证在该区块进行钻井施工的安全和顺利进行。

Overflow and leakage are common in the process of well drilling in Wangchang Oilfield. The major factors are fractured salt layers, water injection between salt layers, high--pressure oil layers and water layers existing in the local part, formation deficit, low--pressure stratum and faults. Only by properly locating the well, scientifically design well structure, adopting a perfect plan in respond to possible overflow and leakage and taking special counter- measures for major blocks where the risks of overflow and leakage are much higher can well drilling in Wangchang Oilfield go on safely and smoothly.