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AssigneesTsinghua University, Well Logging Company of Daqing Petroleum Administration Bureau
InventorsZhenpeng Chen, Sida Xu, Shengjiang Zhu, Jinglan Zhao, Jingkang Deng, Webin Zhu, Yeying Sun, Xiancai Qu, Huazhang Li
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A sealed tube neutron generator (α-STNG) incorporates an internal associated-α detector for well logging. The α-STNG comprises a gas-tight envelope, a Penning ion source, a gas supply, an accelerating electrode and a target as those in conventional STNG; and further comprises a special target chamber, an ion leading out and focusing assembly, an annular associated -α particle detector mounted in the target chamber, a gas absorber, and a collimator for α-particles. The α-STNG can be employed within a nuclear Carbon/Oxygen Well Logging Apparatus which adopts the Associated Particle and Time of Flight Approach for collecting data to satisfy the special requirements of well logging, to expel the adverse effect resulted from cased hole materials and thermal neutrons capture for increasing the precision of carbon/oxygen ratio logged. When the carbon window is 3.17 to 4.65 Mev and the oxygen window is 4.68 to 6.43 Mev, the difference between the C/O values logged on calibration oil well and calibration water well, respectively, is more than 0.35.
A sealed tube neutron generator (α-STNG) incorporating an internal associated α-detector for well logging, comprising:
A sealed tube neutron generator (α-STNG) incorporating an internal associated α-detector for well logging, comprising:
Dependencies are inferred from the claim text.