Volume of Changning Kingdom: Section 46 Oil Field Construction (4)
The next day, they went to b3, the most promising point, to conduct on-site exploration to see if it was possible to drill it into an oil well first.
Only after arriving at the site did they realize how difficult B3 was. Most of this huge piece of granite was buried underground, with only a small part exposed. However, traces of oil seeping into the ground could be clearly seen from the edges of the exposed stone.
After discovering that there was oil seepage here, Qin Xike directed workers to dig a trench around the stone and obtained two pieces of information:
First, the volume of the stone is very large, and it is extremely difficult for them to dig out the stone with their engineering strength. Second, there are certain reserves at this location: about 200 liters of oil seep out from the trench in a day and night. If they can
Once the well is officially drilled, it is conservatively estimated to produce 2 to 3 tons per day.
In the spirit of "mosquito meat is also meat", workers dug a temporary oil storage pool nearby. Half a meter of oil had been deposited in the small pool. Qin Xike picked up a wooden stick and stirred it.
, the oil felt very light and had a strong pungent smell. He took a little as a sample.
Obviously, it is unrealistic to expect the gunpowder on the Wild Wind to explode the rock. The oil well can only wait for the next wave of supply ships to bring them demolition teams and explosives.
"If there is natural gas, it will be a big deal..." Chen Pengyu said.
"The power is doubled - but even if there is natural gas, it is of no use to us. We do not have the ability to store the gas. For safety reasons, we can only burn it directly."
"Let's look at other possible pitfalls."
They looked at several exploration wells with signs of oil and gas outcrops in turn. Oil sand appeared in Pit A11 after only drilling about ten meters, and then disappeared after drilling another five or six meters; Pit A16 was also not drilled deep enough.
Traces of oil appeared, but soon disappeared. Even though we drilled to 50 meters in one go, we still found nothing and had to give up.
After drilling for about twenty meters in Pit A4, water mixed with oil popped up from the sand. The crowd was excited at that time. However, the oil-water mixture did not last long, and most of what emerged was water. Qin Xi
Co specially went to take a look and found that the water did contain oil, but the oil appeared in the form of black threads in the water, which was obviously just the result of groundwater rushing through the oil-bearing layer. The pit was subsequently abandoned.
However, they did not find nothing. One of the exploration pits drilled a stable oil layer. For the first time, they obtained an oil well with a production of more than 1,000 liters day and night. This greatly excited the exploration team. That night, Cui Yunhong ordered all personnel of the entire engineering team to
Each person is given one yuan. Relevant staff are also rewarded.
Within a few days, the exploration team completed the drilling and measurement of the mapping well. Qin Xike directed everyone to lower the resistive tools into the well, record the lateral resistivity curve at the fixed point, and then graphically plot the recording results with the wellbore depth.
, and finally form the well logging curve of the formation.
Based on the preliminary survey and excavation, Qin Xike proposed to Cui Yunhong: Since the formal drilling work requires a large investment, high risks, and strong technical requirements, it is recommended to conduct an evaluation meeting before officially starting drilling and producing oil for each well, and then record it and record it in the relevant files.
Cui Yunhong understood what he was thinking, and that night, he held the first drilling evaluation meeting in the engineering headquarters.
This meeting is actually where Qin Xike reports the exploration situation to all the veterans, and everyone makes a "collective decision" on which exploration sites to exploit.
Through preliminary experimental drilling exploration, they have gained a preliminary understanding of the geological structure, groundwater distribution and possible oil and gas storage areas within 50 meters underground in the two areas AB. They have a rough grasp of the distribution of oil layers.
Combined with the preliminary ground preparation and engineering construction status, Qin Xike marked seven formal drilling points on the map. Then he explained the specific conditions of each point. Then he elaborated on the suggestions: In these seven exploration wells
On the basis of this, he continued drilling and completed the supporting diversion channels and oil storage pools. Finally, he gave the estimated return of these seven drilling wells:
"It is expected that two to three drilling wells can reach commercial oil production standards, and the daily oil production may reach 1,000 barrels. Some individual drilling wells may reach 10,000 barrels per day."
"If we really want to produce 10,000 barrels per day, where should we store our oil? There is no oil pool with a reserve of 10,000 barrels." Huang Lu asked.
"Oil wells can be shut down. This is not a problem." Cui Yunhong said,
"Let's do it then. Why are we holding a special meeting?" Wu Tingwei felt that the meeting was held inexplicably.
"The name is not justified." Chen Pengyu said, "Do you have any other opinions or questions about this plan?"
The meeting ended quickly. The participating elders signed the conclusion document and agreed to drill seven wells. The planned drilling depth is 100 meters, which can be increased to 150 meters according to specific circumstances.
Shortly after the meeting, the weatherman at the temporary weather station issued a heavy rain warning. In Silia, warnings are not issued for heavy rains that occur every day, at least for sustained heavy rainfall of more than 20mm per hour.
warning.
At 16 o'clock in the afternoon, the Petroleum Base Meteorological Observatory observed the first drop of rain falling. Then the sparse raindrops turned into heavy rain. Within a few minutes, water began to pour down as if there was a hole in the sky.
, as if a curtain of water had been hung over the earth. Not to mention continuing to work, even walking in the open air became impossible. All the potholes and low-lying areas on the construction site were filled with water.
The rain continued until midnight and then subsided. The entire mining area became a vast ocean, and many facilities in the camp were damaged. Chen Pengyu had no choice but to notify everyone to stop work.
Two days later, the rain stopped completely. This heavy rain almost destroyed all their previous work. The exploration team had to repair all the soaked steam engines, re-ignite them and start draining water.
Chen Pengyu led the rescue team into the mining area to clean roads and operating sites, and repair machinery and equipment. The elders walked around the mining area and looked at the damage in the mining area. The final decision was to reduce the construction area of the exploration project area by half and concentrate manpower
Material resources were used to clean up the accumulated water; after surface facilities were restored, all mechanical drilling forces concentrated on drilling at the seven selected operating points.
At the beginning of drilling, all Yuanmen took turns to be on duty in the mining area for 24 hours to deal with emergencies in a timely manner and supervise the progress of the project. This drilling is different from the previous exploratory drilling in that a 15 cm diameter sleeve is used. Equipment requirements and personnel
The requirements are much higher.
The machinery factory could not yet produce pressure-resistant seamless pipes with such a large diameter, so the sleeves were based on the experience of the Yanchang Oilfield in the old time. At that time, the mining department of the Yanchang Oilfield did not have casings and used captured Japanese large-caliber artillery bodies.
Pipe. The machine factory followed the same method. According to the manufacturing process of artillery barrel, the barrel was first cast with wrought iron, and then drilled in the center after hammer forging to create the "barrel".
Early the next morning, each drilling team entered the working surface. At the same time, the command headquarters notified the lumber factory and machinery maintenance station to enter a 24-hour standby state. The command headquarters moved to the work shed built next to the main channel. This operation will separate the seven drilling wells.
Wells No. 1 to No. 7. At 3 p.m. that day, drilling officially started. Since there were only four steam engines, two were used to drive the drilling rig and two were used to drive the mud pump, so only Well No. 1 and Well No. 2 were started at the same time.
Qin Xike organized a patrol emergency team to inspect various operating sites and report any unsatisfactory drilling conditions to the headquarters in a timely manner.
When drilling started, everything was normal and everything was going smoothly. However, on the morning of the next day, a driller came to report that Well No. 2 had encountered an emergency.
"What? Too much pressure? Can't drill. Please make it clear." A member of the emergency team came to report to Qin Xike.
However, the worker's report was unclear. After listening to it, Qin Xike felt that the situation was somewhat urgent, so he sent someone to find Cui Yunhong. Several people arrived on the No. 2 drilling platform together.
It turns out that the drilling well entered the gas layer when it was 40 meters deep. The natural gas with huge pressure surged up in the drill pipe against the mud column, and the entire working surface became a mud pond. The mud pump could not be stopped, so the drill pipe could not be added.
In two hours, not only did the drilling fail to drill forward 1 centimeter, but the gushing mud caused the drill bit to retreat by more than half a meter.
"Install the back pressure valve!" Qin Xike immediately asked to add a back pressure valve in front of the drill bit, "Hurry up! Otherwise, your work will be in vain!"
The Machinery Industry Group had not originally produced this kind of equipment, but as a common oil well equipment, Qin Xike specially communicated with Zhan Wuya and organized the production of part of it. The main structure of this thing is two discs, with a large disc in the middle.
5 cm round hole, the diameter of the small disc is larger than the hole of the large disc. The two discs are combined with a hinge and installed on the bottom drill pipe joint. When the mud flows from top to bottom to the bottom of the well, the small disc opens downwards
channel; when the pump is stopped, the small disc covers the hole of the large disc, so that the mud at the bottom of the well will not be pushed up by the bottom hole pressure. Due to the use of a back pressure valve, the No. 2 drilling platform successfully drilled through the gas layer.
Over the next six hours, nine meters were drilled.
The emergence of natural gas layers proves that they are very close to oil layers - this is an exciting sign.
On the third day after drilling started, the No. 2 drilling platform had exceeded the planned drilling depth of 100 meters. When Chen Pengyu went to the drilling platform for inspection at 5 o'clock in the morning, he found that the mud pump ran more easily and the turntable rotated more flexibly.
Get up, he knows that there will be a satisfactory result soon.
Sure enough, at nine o'clock in the morning, the driller reported that crude oil began to appear in the mud tank, and gradually the amount of oil returned became larger and larger. The workers cleaned up the diversion trough and introduced the crude oil into the measuring pool according to the prior training. At noon, Chen Pengyu sent someone
Ask Qin Xike, who is on duty in the living area, to go to the drilling platform with Cui Yunhong to discuss the next step.