深层火山岩储层试油(气)技术难点分析及对策探讨

A Discussion on Technical Difficulties of Well Testing in Deep Volcanics Reservoir and Their Countermeasures

深层火山岩油气藏普遍具有井深、高温、高压、高产油气、易漏易喷、储层易受污染、易含酸性腐蚀性气体、地层易垮塌、可能出砂等难点,试油(气)方案制定难度大,工程施工风险高。分析了不同类型火山岩油气藏的试油(气)地质特点及技术难点,通过一口井实例,给出了一套适合深层火山岩试油(气)的技术方案及对策,提出了认识和建议,为今后形成系统的火山岩气藏的相关试油技术理论和现场应用有较好的指导作用。

There usually are some difficulties in well testing in deep volcanics reservoirs,for example,the depth of tested well is deep,the temperature and the pressure are high,oil or/and gas flow rate is high,leaking or/and flowing out happens easily,reservoir is damaged easily,fluid contains sour and corrosive gas,and the reservoir produces sand and collapses easily etc.Therefore technical program of well testing is difficult to make and operation is risky.This paper analyzes different geological characteristics of various volcanics reservoirs and technical difficulties of well testing,proposes a set of techniques applied in deep volcanics reservoirs,and lays a foundation for establishing a systematic theory and practice of well test in volcanics reservoirs.