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SWLGS Luncheon Topics

Updated August 05, 2003

September 2001

Turtle Bayou-History of Development
Ralph J. Daigle, PetroQuest Energy, Inc.


Abstract Summary: Turtle Bayou is located in northern Terrebonne Parish within the Houma Embayment. The general structure configuration above Cristellaria I (Hollywood) are two faulted low relief anticlines downthrown to a series of down-to-the-coast faults. Below the Cristellaria I the structure is a single anticline downthrown to an arcuate Middle Miocene growth fault. Depositional thickening of the deeper section (Cris I and below) documents shelf edge to upper slope environment. The productive section at Turtle Bayou is Texularia L. through the Robulus L. strata. The field has produced 926 BCFG and 29 MMBL condensate since the discovery.

Shell Oil discovered Turtle Bayou in 1949 and continually developed the field until 1990. It was believed to be in its final stage of development. Hoping to find an additional 10% of the field reserves, American Explorer acquired an interest in Turtle Bayou in 1990 and:

  • Phase I - Acquired additional 2D and drilled six (6) wells.
  • Phase II - Shot first 3D with Shell and PGE and drilled four (4) wells.
  • Phase III - Purchase of 21 square miles of GECO 3D spec data, and drilled four (4) additional wells.
  • Phase IV - Reprocessed the GECO data (prestack time migration) and we are currently drilling the #16 well.

To date PetroQuest (American Explorer) has produced in excess of 65 BCF and has an additional 25 BCF+ of remaining reserves.

Biographical Sketch: Ralph J. Daigle earned a Bachelor of Science in Math and Physics from Southeastern Louisiana University in Hammond, Louisiana in June of 1970.

From February of 1971 to October of 1973, Mr. Daigle was employed with Seiscom Delta Inc. in Jackson, Mississippi. He joined Union Oil Company in October of 1973 as Offshore Geophysicist in Lafayette until June of 1977. Ralph began employment with Texas Pacific Oil Company in their South Louisiana Onshore Division in 1977 and worked there until July of 1979. In July of 1979, Mr. Daigle joined X-Plor, an exploration and production consulting group representing El Paso Exploration and Wagner and Brown in the deep Tuscaloosa Trend of South Louisiana. From 1984 to 1989 he worked as an independent geophysical consultant. Mr. Daigle joined American Explorer, Inc. as an owner in July of 1989. In 1995, American Explorer LLC was formed with Mr. Daigle as a partner along with Alfred J. Thomas, II and Charles T. Goodson. In 1998, American Explorer, LLC merged with Optima Petroleum in a reverse takeover to form PetroQuest Energy, Inc., and Mr. Daigle became its Senior Vice President of Exploration, the same position he holds today.

Mr. Daigle is a former president of the Southwestern Louisiana Geophysical Society, a member of the Society of Professional Earth Scientist (SIPES), the Lafayette Geological Society, and a former director and vice president of the Lafayette Petroleum Club. He is a member of the Lafayette Chamber of Commerce, United Way, Boys and Girls Clubs of Acadiana, Covenant House, and the Cerebral Palsy Association. He is married to Margaret Stokes and has three daughters.