1. Marine Engineering Geological Survey of Nanpu Surveying Area of ??Jidong Oilfield
The innovation points achieved in the comprehensive research report of this project are:
1) For the first time, the Hebei Province A set of sedimentary sequences and depositional models have been established in the East Plain: the transgression in the early Late Pleistocene was a period of stable high sea level; the late Pleistocene was a regression period, during which continental layers dominated by fluvial facies were deposited; the Late Pleistocene The end of the epoch was the deglaciation period, and lacustrine sediments developed. Marine transgression began again in the Holocene, and the Luanhe River Delta developed in the area. In the later period, modern marine dynamic processes began, and the delta began to recede. This plays an important role in the study of the evolution of Quaternary geological history and the Quaternary historical process of the Jidong Plain.
2) It is entirely possible for the carefully debugged Geopulse system to be used for exploration in extremely shallow sea areas. The manufacturer of this equipment believes that it should be applied in waters with a water depth of ≥4.0m to obtain satisfactory results, and this system This survey also obtained clear records in the water depth range of ≥0.8m. The key is to study the optimal model for the selected instrument parameter factors. In areas without low velocity layers, the maximum recorded depth can reach 120m.
3) We have the latest understanding of the Holocene Luanhe Delta system, which is composed of five delta bodies (delta fans) of different eras. Neither the base nor the top of the delta is developed, but is mainly composed of foreset layers. The grain size becomes coarser from bottom to top, belonging to a progradational sequence.
4) The Quaternary faults in the survey area are very developed. 156 faults were discovered, all of which are high-angle normal faults. The cross-section is almost vertical, the maximum fault distance can reach 25 meters, and the longest fault is 16.5 meters. km, is a developing syngenetic fault with a growth rate of 0.02 to 0.03 mm/a, which is one of the important signs of neotectonic movement in eastern Hebei.
5) For the first time, the delta in the survey area is divided into three major areas based on engineering geological stability and sediment characteristics, namely: Area I - sandy submarine engineering geological area; Area II - silty silt Submarine engineering geology area; Zone III—low velocity layer and landslide body submarine engineering geology area. Based on the geological hazard factors and seabed landforms, 13 sub-regions are further divided into 6 categories. The division of engineering geological zones has important practical value for oil and gas exploration in this sea area and oil and gas construction projects such as oil pipelines.
2. Research on Stabilizing Device for Static Penetration in Extremely Shallow Seas
Shandong Provincial Science and Technology Commission organized experts to review and appraise the project "Stabilizing Device for Static Penetration in Extremely Shallow Seas" hosted by me. The expert group appraised the results and concluded that:
The development of this project has successfully solved the problem of static cone testing in waters, especially in extremely shallow sea areas; This solves key issues such as the stability and anti-interference of instrument placement. The static cone penetration in-situ testing technology has been applied to the dynamic environment of extremely shallow sea areas and has achieved good results. At the same time, it has filled a gap in marine engineering geological survey methods in extremely shallow sea areas.
The ultra-shallow sea static cone sounding stabilization device has reasonable design and superior technical performance. It has been proved by large-scale production practice and scientific research experimental results that all technical parameters are reliable and meet the technical requirements of relevant national specifications.
The device is light and easy to use, allowing the static cone penetration in-situ testing technology to be carried out directly on small ships, and can be combined with other offshore survey work (such as drilling, sampling, bathymetry and shallow strata Sections, etc.) operate on the same ship, saving a lot of manpower, material and financial resources.
In actual work, this device can obtain high-precision measurement data and provide detailed and reliable basic engineering geological data. The review expert group believes that the development of the device has reached the leading domestic level and recommends that the device be finalized and promoted to the society.
This project has obtained a utility model patent from the State Patent Office of the People's Republic of China. The patent holder is Qingdao Institute of Marine Geology and Qingdao Marine Geological Engineering Survey Institute, and the patent number is ZL94 2 35820.3.
3. Qingdao Bay Bridge Marine Engineering Geological Survey
Currently domestic and foreign bridge engineering geological surveys are mainly drilling for Quaternary loose sediments, supplemented by bedrock drilling. This project mainly focuses on rock drilling and is carried out in sea areas with large water depth, flow velocity and tide height.
The main innovation points are:
1) The report completed on this project is a large-scale comprehensive engineering geological survey report. The review expert group believes that the report provides detailed and comprehensive information for the construction and design units. Accurate and high-quality results, and for the first time it was proposed that the underwater extension width of the Cangkou fault zone is more than 320 meters, and the accurate position of its underwater extension was determined. Its activity rate is small and it does not belong to the Holocene active fault. It provides an important basis for the Bay Bridge's plan comparison and location determination during the construction feasibility stage, and provides a strong guarantee for the Qingdao Municipal Government to apply to the State Planning Commission for approval of the bridge location and bridge type plan.
2) It has favorably verified the view that the west side of the mouth of Jiaozhou Bay is a series of calderas. It also proposed for the first time that the ancient basement of Jiaozhou Bay is the Proterozoic Jiaonan Group potash gneiss. The review expert team believes that This point of view is put forward because it is at the domestic advanced level in studying the evolution of Jiaozhou Bay and evaluating the engineering geological characteristics of bridge locations.
3) Adopting advanced drilling technology and exposed bedrock seabed drilling platform anchoring technology, a high recovery rate of cores was obtained, filling the gap in geological drilling at the mouth of Jiaozhou Bay, not only for Qingdao Bay The construction of the bridge has high application value, and it also has great theoretical significance for studying the evolution of Jiaozhou Bay.