发明名称 |
METHOD AND DEVICE FOR DETERMINING ASPHALTENE PRECIPITATION ONSET PRESSURE. |
摘要 |
<p>A process is provided for determining asphaltene precipitation onset pressure in formation fluid. In one embodiment the process includes the steps of: (a) isolating a downhole sample of formation fluid; (b) illuminating the sample with UV light; (c) measuring fluorescence energy emanating from the sample; (d) reducing pressure on the sample; (e) repeating steps (b) to (d); and (f) setting asphaltene precipitation onset pressure equal to pressure on the sample when an abrupt change in fluorescence energy is detected. A downhole optical analyzer includes a UV lamp; a piston adapted to decrease pressure of the fluid in an optical cell region by increasing the volume of an isolated sample of formation fluid; and a pressure sensor for sensing pressure of the isolated sample.</p> |
申请公布号 |
MXPA02002696(A) |
申请公布日期 |
2002.07.30 |
申请号 |
MX2002PA02696 |
申请日期 |
2000.09.05 |
申请人 |
SCHLUMBERGER SURENCO S.A. |
发明人 |
OLIVER C. MULLINS |
分类号 |
G01N21/64;G01N33/28;(IPC1-7):E21B47/00 |
主分类号 |
G01N21/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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