Songhua Chen
106Patents
15h-index
71Co-inventors
89Inventor score
Filing activity: Dec 19, 1997 → Jul 27, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6755246B2 | In-situ heavy-oil reservoir evaluation with artificial temperature elevation | Physics | 52 | Expired |
| US6392409B1 | Determination of T1 relaxation time from multiple wait time NMR logs acquired in the same or different logging passes | Emerging Cross-Sectional Technologies | 49 | Expired |
| US6225803A | NMR log processing using wavelet filter and iterative inversion | Physics | 47 | Expired |
| US6084408A | Methods for acquisition and processing of nuclear magnetic resonance signals for determining fluid properties in petroleum reservoirs having more than one fluid phase | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6069477A | Method for improving the accuracy of NMR relaxation distribution analysis with two echo trains | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6331775A | Gas zone evaluation by combining dual wait time NMR data with density data | Physics | 31 | Expired |
| US6400148B1 | Use of redundant data for log quality measurements | Physics | 30 | Expired |
| US7363161B2 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Physics | 22 | Active |
| US6600316B2 | Rapid NMR multi-frequency T1 and T2 acquisition for earth formations evaluation with MWD or wireline tools | Physics | 22 | Expired |
| US7565833B2 | Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis | Physics | 20 | Active |
| US6388441B1 | Method for processing NMR data without phase-alternating-pair (PAP) averaging | Physics | 17 | Expired |
| US7356413B2 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Physics | 17 | Expired |
| US7257490B2 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Physics | 17 | Expired |
| US6972564B2 | Objective oriented methods for NMR log acquisitions for estimating earth formation and fluid properties | Physics | 16 | Expired |
| US7253617B1 | Method and apparatus for characterizing heavy oil components in petroleum reservoirs | Physics | 15 | Expired |
| US7298142B2 | Method and apparatus for reservoir fluid characterization in nuclear magnetic resonance logging | Physics | 14 | Expired |
| US7753119B2 | In-situ heavy-oil reservoir evaluation with artificial temperature elevation | Physics | 14 | Active |
| US8646520B2 | Precision marking of subsurface locations | Electricity | 14 | Active |
| US7825659B2 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Physics | 14 | Active |
| US8195399B2 | Method of determining downhole formation grain size distribution using acoustic and NMR logging data | Physics | 12 | Active |
| US8115481B2 | Method of discerning water from hydrocarbon fluids using downhole NMR instruments in petroleum reservoirs with formation brine | Emerging Cross-Sectional Technologies | 12 | Active |
| US7301338B2 | Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis | Physics | 10 | Expired |
| US6859034B2 | Time-domain data integration of multiple gradient, multiple TE echo trains | Physics | 10 | Expired |
| US9081117B2 | Method and apparatus for predicting petrophysical properties from NMR data in carbonate rocks | Physics | 10 | Active |
| US7227355B2 | Method of detecting, quantifying and correcting borehole contaminations from multi-frequency, multi-sensitive-volume NMR logging data | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.