COMPACT FLUID DISPOSAL SYSTEM AND METHOD FOR SURFACE WELL TESTING

• US 20110023595A1
• Filed: 12/24/2008
• Published: 02/03/2011
• Est. Priority Date: 12/24/2007
• Status: Abandoned Application

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Allouche, Francis
• Application Number:
  US12/810,158
• Publication Number:
  US 20110023595A1
• Time in Patent Office: Days
• US Class Current: 73/152.29
• CPC Class Codes: E21B 49/08 Obtaining fluid samples or testing fluids, in boreholes or wells
• CPC Class Codes: G01F 1/74 Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
• CPC Class Codes: G01F 15/08 Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters

Abstract

A compact fluid disposal and surface well testing system and method, including a multiphase meter for flow-metering and sampling of a received oil/gas/water stream and generating flow information for the received oil/gas/water stream; a compact gas/liquid splitter coupled to the multiphase meter and configured for generating a gas rich stream, and a liquid rich stream from the oil/gas/water stream based on the flow information from the multiphase meter; and a free water knock out (FWKO)/holding tank coupled to the compact gas/liquid splitter for receiving the liquid rich stream from the compact gas/liquid splitter and degassing the liquid rich stream and performing oil/water separation on the liquid rich stream.

Claims

1. A compact fluid disposal and surface well testing system, the system including:

a multiphase meter for flow-metering and sampling of a received oil/gas/water stream and generating flow information for the received oil/gas/water stream;

a compact gas/liquid splitter coupled to the multiphase meter and configured for generating a gas rich stream, and a liquid rich stream from the oil/gas/water stream based on the flow information from the multiphase meter; and

a free water knock out (FWKO)/holding tank coupled to the compact gas/liquid splitter for receiving the liquid rich stream from the compact gas/liquid splitter and degassing the liquid rich stream and performing oil/water separation on the liquid rich stream.

2. The system of claim 1, further comprising a wet gas flare coupled to the compact gas/liquid splitter for receiving the gas rich stream from the compact gas/liquid splitter.

3. The system of claim 2, further comprising an oil burner coupled to the compact gas/liquid splitter and the FWKO/holding tank for receiving the liquid rich stream from the compact gas/liquid splitter or an oil stream from the FWKO/holding tank via a transfer pump therebetween.

4. The system of claim 3, wherein the FWKO/holding tank includes a gas vent for venting gas that is degassed from the liquid rich stream by the FWKO/holding tank.

5. The system of claim 4, wherein the FWKO/holding tank includes an output for sending fluids from the liquid rich stream to a rig tank or pit.

6. The system of claim 3, wherein the FWKO/holding tank further includes an electro-coalescer for enhancing the purity of the water separated from the liquid rich stream.

7. The system of claim 6, wherein the FWKO/holding tank further includes an auto-adjustable floating smart weir for optimizing the oil/water separation on the liquid rich stream.

8. The system of claim 5, wherein the system is used for a beginning of a clean up phase of a well and effluent is directly sent to a holding compartment of the FWKO/holding tank for degassing purposes or flows through to the compact gas/liquid splitter to handle gas pockets.

9. The system of claim 5, wherein the system is used for clean up of a well in development and effluent is pre-separated through the compact gas/liquid splitter, the liquid rich stream is sent to an oil/water separation compartment of the FWKO/holding tank for degassing and oil/water separation, wherein water is extracted from a bottom of the FWKO/holding tank for disposal, and separated oil is pumped and burned with the oil burner, and the gas rich stream is sent to the wet gas flare.

10. The system of claim 5, wherein the system is used to stabilize flow of a well, wherein the liquid rich stream includes less than 25% of water so that a resulting liquid is directly burnable through the oil burner and the gas rich stream is sent to the wet gas flare.

11. A method for fluid disposal and surface well testing system, the method including:

flow-metering and sampling of a received oil/gas/water stream and generating flow information for the received oil/gas/water stream with a multiphase meter;

generating a gas rich stream, and a liquid rich stream from the oil/gas/water stream based on the flow information from the multiphase meter with a compact gas/liquid splitter coupled to the multiphase meter; and

receiving the liquid rich stream from the compact gas/liquid splitter and degassing the liquid rich stream and performing oil/water separation on the liquid rich stream with a free water knock out (FWKO)/holding tank coupled to the compact gas/liquid splitter.

12. The method of claim 11, further comprising receiving the gas rich stream from the compact gas/liquid splitter with a wet gas flare coupled to the compact gas/liquid splitter.

13. The method of claim 12, further comprising receiving the liquid rich stream from the compact gas/liquid splitter or an oil stream from the FWKO/holding tank via a transfer pump with an oil burner coupled to the compact gas/liquid splitter and the FWKO/holding tank.

14. The method of claim 13, further comprising venting gas that is degassed from the liquid rich stream with a gas vent of the FWKO/holding tank.

15. The method of claim 14, further comprising sending fluids from the liquid rich stream to a rig tank or pit with an output of the FWKO/holding tank.

16. The method of claim 13, further comprising enhancing the purity of the water separated from the liquid rich stream with an electro-coalescer of the FWKO/holding tank.

17. The method of claim 16, further comprising optimizing the oil/water separation on the liquid rich stream with an auto-adjustable floating smart weir of the FWKO/holding tank.

18. The method of claim 15, further comprising beginning of a clean up phase of a well, including directly sending effluent to a holding compartment of the FWKO/holding tank for degassing purposes or flowing effluent through to the compact gas/liquid splitter to handle gas pockets.

19. The method of claim 15, further comprising performing clean up of a well in development, including pre-separating effluent through the compact gas/liquid splitter, sending the liquid rich stream to an oil/water separation compartment of the FWKO/holding tank for degassing and oil/water separation, extracting water from a bottom of the FWKO/holding tank for disposal, pumping separated oil for burning with the oil burner, and sending the gas rich stream to the wet gas flare.

20. The method of claim 15, further comprising stabilizing flow of a well, wherein the liquid rich stream includes less than 25% of water, including directly burning the resulting liquid through the oil burner, and sending the gas rich stream to the wet gas flare.